72307307 has 4 divisors (see below), whose sum is σ = 76560696. Its totient is φ = 68053920.

The previous prime is 72307297. The next prime is 72307309. The reversal of 72307307 is 70370327.

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 72307307 - 2⁸ = 72307051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72307307.

It is not an unprimeable number, because it can be changed into a prime (72307309) 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, 2126669 + ... + 2126702.

It is an arithmetic number, because the mean of its divisors is an integer number (19140174).

Almost surely, 2^72307307 is an apocalyptic number.

72307307 is a deficient number, since it is larger than the sum of its proper divisors (4253389).

72307307 is a wasteful number, since it uses less digits than its factorization.

72307307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253388.

The product of its (nonzero) digits is 6174, while the sum is 29.

The square root of 72307307 is about 8503.3703318155. The cubic root of 72307307 is about 416.6077989012.

The spelling of 72307307 in words is "seventy-two million, three hundred seven thousand, three hundred seven".