123377409 has 12 divisors (see below), whose sum is σ = 178326096. Its totient is φ = 82198872.

The previous prime is 123377399. The next prime is 123377447. The reversal of 123377409 is 904773321.

It is not a de Polignac number, because 123377409 - 2⁵ = 123377377 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (123377479) 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 in 11 ways as a sum of consecutive naturals, for example, 14862 + ... + 21624.

It is an arithmetic number, because the mean of its divisors is an integer number (14860508).

Almost surely, 2^123377409 is an apocalyptic number.

It is an amenable number.

123377409 is a deficient number, since it is larger than the sum of its proper divisors (54948687).

123377409 is a wasteful number, since it uses less digits than its factorization.

123377409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796 (or 8793 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 123377409 is about 11107.5383861592. The cubic root of 123377409 is about 497.8271161638.

The spelling of 123377409 in words is "one hundred twenty-three million, three hundred seventy-seven thousand, four hundred nine".