123931601 has 2 divisors, whose sum is σ = 123931602. Its totient is φ = 123931600.

The previous prime is 123931597. The next prime is 123931603. The reversal of 123931601 is 106139321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 41938576 = 9055^2 + 6476^2 .

It is a cyclic number.

It is not a de Polignac number, because 123931601 - 2² = 123931597 is a prime.

Together with 123931603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123931603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61965800 + 61965801.

It is an arithmetic number, because the mean of its divisors is an integer number (61965801).

Almost surely, 2^123931601 is an apocalyptic number.

It is an amenable number.

123931601 is a deficient number, since it is larger than the sum of its proper divisors (1).

123931601 is an equidigital number, since it uses as much as digits as its factorization.

123931601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 123931601 is about 11132.4570962569. The cubic root of 123931601 is about 498.5713900347.

The spelling of 123931601 in words is "one hundred twenty-three million, nine hundred thirty-one thousand, six hundred one".