123495917 has 2 divisors, whose sum is σ = 123495918. Its totient is φ = 123495916.

The previous prime is 123495863. The next prime is 123495919. The reversal of 123495917 is 719594321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121462441 + 2033476 = 11021^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 123495917 - 2¹² = 123491821 is a prime.

Together with 123495919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123495919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61747958 + 61747959.

It is an arithmetic number, because the mean of its divisors is an integer number (61747959).

Almost surely, 2^123495917 is an apocalyptic number.

It is an amenable number.

123495917 is a deficient number, since it is larger than the sum of its proper divisors (1).

123495917 is an equidigital number, since it uses as much as digits as its factorization.

123495917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 123495917 is about 11112.8716810733. The cubic root of 123495917 is about 497.9864581835.

The spelling of 123495917 in words is "one hundred twenty-three million, four hundred ninety-five thousand, nine hundred seventeen".