256038697 has 2 divisors, whose sum is σ = 256038698. Its totient is φ = 256038696.

The previous prime is 256038647. The next prime is 256038721. The reversal of 256038697 is 796830652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203461696 + 52577001 = 14264^2 + 7251^2 .

It is a cyclic number.

It is not a de Polignac number, because 256038697 - 2¹⁵ = 256005929 is a prime.

It is a super-3 number, since 3×256038697³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (256038617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128019348 + 128019349.

It is an arithmetic number, because the mean of its divisors is an integer number (128019349).

Almost surely, 2^256038697 is an apocalyptic number.

It is an amenable number.

256038697 is a deficient number, since it is larger than the sum of its proper divisors (1).

256038697 is an equidigital number, since it uses as much as digits as its factorization.

256038697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 256038697 is about 16001.2092355547. The cubic root of 256038697 is about 634.9924127475.

The spelling of 256038697 in words is "two hundred fifty-six million, thirty-eight thousand, six hundred ninety-seven".