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397052305 = 5136108497
BaseRepresentation
bin10111101010101…
…000100110010001
31000200010100100221
4113222220212101
51303121133210
6103222113041
712560613616
oct2752504621
91020110327
10397052305
11194142301
12b0b7b781
136434b9c0
143aa3850d
1524cd01da
hex17aa8991

397052305 has 8 divisors (see below), whose sum is σ = 513113832. Its totient is φ = 293207808.

The previous prime is 397052269. The next prime is 397052317. The reversal of 397052305 is 503250793.

It can be written as a sum of positive squares in 4 ways, for example, as 36204289 + 360848016 = 6017^2 + 18996^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397052305 - 217 = 396921233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3054184 + ... + 3054313.

It is an arithmetic number, because the mean of its divisors is an integer number (64139229).

Almost surely, 2397052305 is an apocalyptic number.

It is an amenable number.

397052305 is a deficient number, since it is larger than the sum of its proper divisors (116061527).

397052305 is a wasteful number, since it uses less digits than its factorization.

397052305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6108515.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 397052305 is about 19926.1713582916. The cubic root of 397052305 is about 734.9919353705.

The spelling of 397052305 in words is "three hundred ninety-seven million, fifty-two thousand, three hundred five".

Divisors: 1 5 13 65 6108497 30542485 79410461 397052305