256977379 has 8 divisors (see below), whose sum is σ = 260421840. Its totient is φ = 253541376.

The previous prime is 256977373. The next prime is 256977397. The reversal of 256977379 is 973779652.

It is a happy number.

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 256977379 - 2⁷ = 256977251 is a prime.

It is a super-3 number, since 3×256977379³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256977373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79507 + ... + 82675.

It is an arithmetic number, because the mean of its divisors is an integer number (32552730).

Almost surely, 2^256977379 is an apocalyptic number.

256977379 is a deficient number, since it is larger than the sum of its proper divisors (3444461).

256977379 is an equidigital number, since it uses as much as digits as its factorization.

256977379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229.

The product of its digits is 5000940, while the sum is 55.

The square root of 256977379 is about 16030.5139967501. The cubic root of 256977379 is about 635.7674635768.

The spelling of 256977379 in words is "two hundred fifty-six million, nine hundred seventy-seven thousand, three hundred seventy-nine".