72747707 has 4 divisors (see below), whose sum is σ = 72838440. Its totient is φ = 72656976.

The previous prime is 72747691. The next prime is 72747733. The reversal of 72747707 is 70774727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70774727 = 5657 ⋅12511.

It is a cyclic number.

It is not a de Polignac number, because 72747707 - 2⁴ = 72747691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72747737) 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, 44153 + ... + 45770.

It is an arithmetic number, because the mean of its divisors is an integer number (18209610).

Almost surely, 2^72747707 is an apocalyptic number.

72747707 is a deficient number, since it is larger than the sum of its proper divisors (90733).

72747707 is an equidigital number, since it uses as much as digits as its factorization.

72747707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90732.

The product of its (nonzero) digits is 134456, while the sum is 41.

The square root of 72747707 is about 8529.2266355163. The cubic root of 72747707 is about 417.4518944896.

The spelling of 72747707 in words is "seventy-two million, seven hundred forty-seven thousand, seven hundred seven".