256742699 has 2 divisors, whose sum is σ = 256742700. Its totient is φ = 256742698.

The previous prime is 256742693. The next prime is 256742719. The reversal of 256742699 is 996247652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256742699 - 2⁴ = 256742683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256742693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128371349 + 128371350.

It is an arithmetic number, because the mean of its divisors is an integer number (128371350).

Almost surely, 2^256742699 is an apocalyptic number.

256742699 is a deficient number, since it is larger than the sum of its proper divisors (1).

256742699 is an equidigital number, since it uses as much as digits as its factorization.

256742699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 256742699 is about 16023.1925345731. The cubic root of 256742699 is about 635.5738702073.

The spelling of 256742699 in words is "two hundred fifty-six million, seven hundred forty-two thousand, six hundred ninety-nine".