123791641 has 2 divisors, whose sum is σ = 123791642. Its totient is φ = 123791640.

The previous prime is 123791609. The next prime is 123791651. The reversal of 123791641 is 146197321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118483225 + 5308416 = 10885^2 + 2304^2 .

It is a cyclic number.

It is not a de Polignac number, because 123791641 - 2⁵ = 123791609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123791597 and 123791606.

It is not a weakly prime, because it can be changed into another prime (123791651) 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, 61895820 + 61895821.

It is an arithmetic number, because the mean of its divisors is an integer number (61895821).

Almost surely, 2^123791641 is an apocalyptic number.

It is an amenable number.

123791641 is a deficient number, since it is larger than the sum of its proper divisors (1).

123791641 is an equidigital number, since it uses as much as digits as its factorization.

123791641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 123791641 is about 11126.1691969878. The cubic root of 123791641 is about 498.3836350258.

The spelling of 123791641 in words is "one hundred twenty-three million, seven hundred ninety-one thousand, six hundred forty-one".