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253691001 = 339395963
BaseRepresentation
bin11110001111100…
…00010001111001
3122200100211122000
433013300101321
51004421103001
641101251213
76200223624
oct1707602171
9580324560
10253691001
11120224893
1270b63b09
1340735725
142599adbb
1517412a86
hexf1f0479

253691001 has 8 divisors (see below), whose sum is σ = 375838560. Its totient is φ = 169127316.

The previous prime is 253690999. The next prime is 253691003. The reversal of 253691001 is 100196352.

It is an interprime number because it is at equal distance from previous prime (253690999) and next prime (253691003).

It is not a de Polignac number, because 253691001 - 21 = 253690999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9395963 = 253691001 / (2 + 5 + 3 + 6 + 9 + 1 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (253691003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4697955 + ... + 4698008.

It is an arithmetic number, because the mean of its divisors is an integer number (46979820).

Almost surely, 2253691001 is an apocalyptic number.

It is an amenable number.

253691001 is a deficient number, since it is larger than the sum of its proper divisors (122147559).

253691001 is an equidigital number, since it uses as much as digits as its factorization.

253691001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395972 (or 9395966 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 253691001 is about 15927.6803395849. The cubic root of 253691001 is about 633.0456380922.

The spelling of 253691001 in words is "two hundred fifty-three million, six hundred ninety-one thousand, one".

Divisors: 1 3 9 27 9395963 28187889 84563667 253691001