72479691 has 10 divisors (see below), whose sum is σ = 108272252. Its totient is φ = 48319740.

The previous prime is 72479689. The next prime is 72479717. The reversal of 72479691 is 19697427.

It is not a de Polignac number, because 72479691 - 2¹ = 72479689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72479611) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 447325 + ... + 447486.

Almost surely, 2^72479691 is an apocalyptic number.

72479691 is a deficient number, since it is larger than the sum of its proper divisors (35792561).

72479691 is an equidigital number, since it uses as much as digits as its factorization.

72479691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894823 (or 894814 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 72479691 is about 8513.5005138897. The cubic root of 72479691 is about 416.9386069755.

The spelling of 72479691 in words is "seventy-two million, four hundred seventy-nine thousand, six hundred ninety-one".