123625649 has 16 divisors (see below), whose sum is σ = 150709248. Its totient is φ = 98990592.

The previous prime is 123625643. The next prime is 123625657. The reversal of 123625649 is 946526321.

It is not a de Polignac number, because 123625649 - 2²⁰ = 122577073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123625643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12512 + ... + 20094.

It is an arithmetic number, because the mean of its divisors is an integer number (9419328).

Almost surely, 2^123625649 is an apocalyptic number.

It is an amenable number.

123625649 is a deficient number, since it is larger than the sum of its proper divisors (27083599).

123625649 is a wasteful number, since it uses less digits than its factorization.

123625649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744.

The product of its digits is 77760, while the sum is 38.

The square root of 123625649 is about 11118.7071640546. The cubic root of 123625649 is about 498.1607747968.

The spelling of 123625649 in words is "one hundred twenty-three million, six hundred twenty-five thousand, six hundred forty-nine".