7972407 has 6 divisors (see below), whose sum is σ = 11515712. Its totient is φ = 5314932.

The previous prime is 7972387. The next prime is 7972411. The reversal of 7972407 is 7042797.

It is a de Polignac number, because none of the positive numbers 2^k-7972407 is a prime.

It is a Duffinian number.

7972407 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 442903 + ... + 442920.

Almost surely, 2^7972407 is an apocalyptic number.

7972407 is a deficient number, since it is larger than the sum of its proper divisors (3543305).

7972407 is a wasteful number, since it uses less digits than its factorization.

7972407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885829 (or 885826 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 7972407 is about 2823.5451120887. The cubic root of 7972407 is about 199.7697934597.

The spelling of 7972407 in words is "seven million, nine hundred seventy-two thousand, four hundred seven".