72696307 has 4 divisors (see below), whose sum is σ = 75857040. Its totient is φ = 69535576.

The previous prime is 72696293. The next prime is 72696313. The reversal of 72696307 is 70369627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70369627 = 23 ⋅3059549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72696307 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 72696307.

It is not an unprimeable number, because it can be changed into a prime (72696347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580332 + ... + 1580377.

It is an arithmetic number, because the mean of its divisors is an integer number (18964260).

Almost surely, 2^72696307 is an apocalyptic number.

72696307 is a deficient number, since it is larger than the sum of its proper divisors (3160733).

72696307 is a wasteful number, since it uses less digits than its factorization.

72696307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160732.

The product of its (nonzero) digits is 95256, while the sum is 40.

The square root of 72696307 is about 8526.2129342399. The cubic root of 72696307 is about 417.3535542406.

The spelling of 72696307 in words is "seventy-two million, six hundred ninety-six thousand, three hundred seven".