257706023 has 4 divisors (see below), whose sum is σ = 257940768. Its totient is φ = 257471280.

The previous prime is 257706017. The next prime is 257706047. The reversal of 257706023 is 320607752.

It is a happy number.

257706023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 257706023 - 2²⁰ = 256657447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257706083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115718 + ... + 117923.

It is an arithmetic number, because the mean of its divisors is an integer number (64485192).

Almost surely, 2^257706023 is an apocalyptic number.

257706023 is a deficient number, since it is larger than the sum of its proper divisors (234745).

257706023 is a wasteful number, since it uses less digits than its factorization.

257706023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234744.

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 257706023 is about 16053.2246916313. The cubic root of 257706023 is about 636.3677900861.

The spelling of 257706023 in words is "two hundred fifty-seven million, seven hundred six thousand, twenty-three".