123656051 has 2 divisors, whose sum is σ = 123656052. Its totient is φ = 123656050.

The previous prime is 123656023. The next prime is 123656053. The reversal of 123656051 is 150656321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123656051 - 2¹⁴ = 123639667 is a prime.

It is a super-3 number, since 3×123656051³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 123656053, 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 (123656053) 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 as a sum of consecutive naturals, namely, 61828025 + 61828026.

It is an arithmetic number, because the mean of its divisors is an integer number (61828026).

Almost surely, 2^123656051 is an apocalyptic number.

123656051 is a deficient number, since it is larger than the sum of its proper divisors (1).

123656051 is an equidigital number, since it uses as much as digits as its factorization.

123656051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 123656051 is about 11120.0742353637. The cubic root of 123656051 is about 498.2016073227.

The spelling of 123656051 in words is "one hundred twenty-three million, six hundred fifty-six thousand, fifty-one".