123790661 has 2 divisors, whose sum is σ = 123790662. Its totient is φ = 123790660.

The previous prime is 123790633. The next prime is 123790687. The reversal of 123790661 is 166097321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110145025 + 13645636 = 10495^2 + 3694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123790661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123790631) 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, 61895330 + 61895331.

It is an arithmetic number, because the mean of its divisors is an integer number (61895331).

Almost surely, 2^123790661 is an apocalyptic number.

It is an amenable number.

123790661 is a deficient number, since it is larger than the sum of its proper divisors (1).

123790661 is an equidigital number, since it uses as much as digits as its factorization.

123790661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 123790661 is about 11126.1251565853. The cubic root of 123790661 is about 498.3823198664.

The spelling of 123790661 in words is "one hundred twenty-three million, seven hundred ninety thousand, six hundred sixty-one".