123089957 has 2 divisors, whose sum is σ = 123089958. Its totient is φ = 123089956.

The previous prime is 123089947. The next prime is 123089969. The reversal of 123089957 is 759980321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114789796 + 8300161 = 10714^2 + 2881^2 .

It is an emirp because it is prime and its reverse (759980321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123089957 - 2¹⁸ = 122827813 is a prime.

It is a super-2 number, since 2×123089957² = 30302275028523698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123089927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61544978 + 61544979.

It is an arithmetic number, because the mean of its divisors is an integer number (61544979).

Almost surely, 2^123089957 is an apocalyptic number.

It is an amenable number.

123089957 is a deficient number, since it is larger than the sum of its proper divisors (1).

123089957 is an equidigital number, since it uses as much as digits as its factorization.

123089957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 123089957 is about 11094.5913399278. The cubic root of 123089957 is about 497.4401931423.

The spelling of 123089957 in words is "one hundred twenty-three million, eighty-nine thousand, nine hundred fifty-seven".