16625939 has 4 divisors (see below), whose sum is σ = 18137400. Its totient is φ = 15114480.

The previous prime is 16625933. The next prime is 16625957. The reversal of 16625939 is 93952661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16625939 - 2²⁰ = 15577363 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16625896 and 16625905.

It is not an unprimeable number, because it can be changed into a prime (16625933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755714 + ... + 755735.

It is an arithmetic number, because the mean of its divisors is an integer number (4534350).

Almost surely, 2^16625939 is an apocalyptic number.

16625939 is a deficient number, since it is larger than the sum of its proper divisors (1511461).

16625939 is a wasteful number, since it uses less digits than its factorization.

16625939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511460.

The product of its digits is 87480, while the sum is 41.

The square root of 16625939 is about 4077.4917535171. The cubic root of 16625939 is about 255.2282411185.

The spelling of 16625939 in words is "sixteen million, six hundred twenty-five thousand, nine hundred thirty-nine".