72162907 has 4 divisors (see below), whose sum is σ = 73698336. Its totient is φ = 70627480.

The previous prime is 72162899. The next prime is 72162919. The reversal of 72162907 is 70926127.

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 72162907 - 2³ = 72162899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72162967) 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, 767644 + ... + 767737.

It is an arithmetic number, because the mean of its divisors is an integer number (18424584).

Almost surely, 2^72162907 is an apocalyptic number.

72162907 is a deficient number, since it is larger than the sum of its proper divisors (1535429).

72162907 is a wasteful number, since it uses less digits than its factorization.

72162907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535428.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 72162907 is about 8494.8753375197. The cubic root of 72162907 is about 416.3302877290.

The spelling of 72162907 in words is "seventy-two million, one hundred sixty-two thousand, nine hundred seven".