72637279 has 8 divisors (see below), whose sum is σ = 85336272. Its totient is φ = 60954240.

The previous prime is 72637241. The next prime is 72637283. The reversal of 72637279 is 97273627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72637279 - 2¹⁹ = 72112991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72637219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253834 + ... + 254119.

It is an arithmetic number, because the mean of its divisors is an integer number (10667034).

Almost surely, 2^72637279 is an apocalyptic number.

72637279 is a deficient number, since it is larger than the sum of its proper divisors (12698993).

72637279 is a wasteful number, since it uses less digits than its factorization.

72637279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507977.

The product of its digits is 222264, while the sum is 43.

The square root of 72637279 is about 8522.7506709982. The cubic root of 72637279 is about 417.2405626391.

The spelling of 72637279 in words is "seventy-two million, six hundred thirty-seven thousand, two hundred seventy-nine".