256372953 has 4 divisors (see below), whose sum is σ = 341830608. Its totient is φ = 170915300.

The previous prime is 256372951. The next prime is 256372981. The reversal of 256372953 is 359273652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 256372953 - 2¹ = 256372951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256372951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42728823 + ... + 42728828.

It is an arithmetic number, because the mean of its divisors is an integer number (85457652).

Almost surely, 2^256372953 is an apocalyptic number.

It is an amenable number.

256372953 is a deficient number, since it is larger than the sum of its proper divisors (85457655).

256372953 is an equidigital number, since it uses as much as digits as its factorization.

256372953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85457654.

The product of its digits is 340200, while the sum is 42.

The square root of 256372953 is about 16011.6505395290. The cubic root of 256372953 is about 635.2686180372.

The spelling of 256372953 in words is "two hundred fifty-six million, three hundred seventy-two thousand, nine hundred fifty-three".