256607413 has 2 divisors, whose sum is σ = 256607414. Its totient is φ = 256607412.

The previous prime is 256607371. The next prime is 256607423. The reversal of 256607413 is 314706652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172738449 + 83868964 = 13143^2 + 9158^2 .

It is a cyclic number.

It is not a de Polignac number, because 256607413 - 2²¹ = 254510261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256607423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128303706 + 128303707.

It is an arithmetic number, because the mean of its divisors is an integer number (128303707).

Almost surely, 2^256607413 is an apocalyptic number.

It is an amenable number.

256607413 is a deficient number, since it is larger than the sum of its proper divisors (1).

256607413 is an equidigital number, since it uses as much as digits as its factorization.

256607413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 256607413 is about 16018.9704101106. The cubic root of 256607413 is about 635.4622158104.

The spelling of 256607413 in words is "two hundred fifty-six million, six hundred seven thousand, four hundred thirteen".