4256687923 has 4 divisors (see below), whose sum is σ = 4257303280. Its totient is φ = 4256072568.

The previous prime is 4256687917. The next prime is 4256687969. The reversal of 4256687923 is 3297866524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4256687923 - 2¹³ = 4256679731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4256687983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297183 + ... + 311176.

It is an arithmetic number, because the mean of its divisors is an integer number (1064325820).

Almost surely, 2^4256687923 is an apocalyptic number.

4256687923 is a deficient number, since it is larger than the sum of its proper divisors (615357).

4256687923 is an equidigital number, since it uses as much as digits as its factorization.

4256687923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615356.

The product of its digits is 4354560, while the sum is 52.

The square root of 4256687923 is about 65243.2979163377. The cubic root of 4256687923 is about 1620.6551131607.

The spelling of 4256687923 in words is "four billion, two hundred fifty-six million, six hundred eighty-seven thousand, nine hundred twenty-three".