256070693 has 2 divisors, whose sum is σ = 256070694. Its totient is φ = 256070692.

The previous prime is 256070627. The next prime is 256070699. The reversal of 256070693 is 396070652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255936004 + 134689 = 15998^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 256070693 - 2²² = 251876389 is a prime.

It is a super-3 number, since 3×256070693³ (a number of 26 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_13993139 and since 256070693 and 13993139 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256070699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128035346 + 128035347.

It is an arithmetic number, because the mean of its divisors is an integer number (128035347).

Almost surely, 2^256070693 is an apocalyptic number.

It is an amenable number.

256070693 is a deficient number, since it is larger than the sum of its proper divisors (1).

256070693 is an equidigital number, since it uses as much as digits as its factorization.

256070693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 256070693 is about 16002.2090037594. The cubic root of 256070693 is about 635.0188623574.

The spelling of 256070693 in words is "two hundred fifty-six million, seventy thousand, six hundred ninety-three".