123657961 has 8 divisors (see below), whose sum is σ = 141733440. Its totient is φ = 105685008.

The previous prime is 123657929. The next prime is 123657967. The reversal of 123657961 is 169756321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123657961 - 2⁵ = 123657929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123657967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23026 + ... + 27883.

It is an arithmetic number, because the mean of its divisors is an integer number (17716680).

Almost surely, 2^123657961 is an apocalyptic number.

It is an amenable number.

123657961 is a deficient number, since it is larger than the sum of its proper divisors (18075479).

123657961 is an equidigital number, since it uses as much as digits as its factorization.

123657961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51263.

The product of its digits is 68040, while the sum is 40.

The square root of 123657961 is about 11120.1601157537. The cubic root of 123657961 is about 498.2041723951.

The spelling of 123657961 in words is "one hundred twenty-three million, six hundred fifty-seven thousand, nine hundred sixty-one".