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1686679297 = 14991125203
BaseRepresentation
bin110010010001000…
…1010111100000001
311100112210012000121
41210202022330001
511423242214142
6435211220241
756540352232
oct14442127401
94315705017
101686679297
117960a5136
123b0a47681
1320b5943b4
14120019089
159d121c67
hex6488af01

1686679297 has 4 divisors (see below), whose sum is σ = 1687806000. Its totient is φ = 1685552596.

The previous prime is 1686679223. The next prime is 1686679307. The reversal of 1686679297 is 7929766861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1686679297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1686679207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561103 + ... + 564100.

It is an arithmetic number, because the mean of its divisors is an integer number (421951500).

Almost surely, 21686679297 is an apocalyptic number.

It is an amenable number.

1686679297 is a deficient number, since it is larger than the sum of its proper divisors (1126703).

1686679297 is a wasteful number, since it uses less digits than its factorization.

1686679297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126702.

The product of its digits is 13716864, while the sum is 61.

The square root of 1686679297 is about 41069.2013192368. The cubic root of 1686679297 is about 1190.3577525224.

The spelling of 1686679297 in words is "one billion, six hundred eighty-six million, six hundred seventy-nine thousand, two hundred ninety-seven".

Divisors: 1 1499 1125203 1686679297