123257723 has 2 divisors, whose sum is σ = 123257724. Its totient is φ = 123257722.

The previous prime is 123257711. The next prime is 123257747. The reversal of 123257723 is 327752321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123257723 - 2⁴ = 123257707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123257723.

It is not a weakly prime, because it can be changed into another prime (123257753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61628861 + 61628862.

It is an arithmetic number, because the mean of its divisors is an integer number (61628862).

Almost surely, 2^123257723 is an apocalyptic number.

123257723 is a deficient number, since it is larger than the sum of its proper divisors (1).

123257723 is an equidigital number, since it uses as much as digits as its factorization.

123257723 is an evil number, because the sum of its binary digits is even.

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

The square root of 123257723 is about 11102.1494765653. The cubic root of 123257723 is about 497.6660866478. Note that the first 3 decimals are identical.

The spelling of 123257723 in words is "one hundred twenty-three million, two hundred fifty-seven thousand, seven hundred twenty-three".