72637733 has 8 divisors (see below), whose sum is σ = 83141568. Its totient is φ = 62165664.

The previous prime is 72637729. The next prime is 72637751. The reversal of 72637733 is 33773627.

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 72637733 - 2² = 72637729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72637333) 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, 2816 + ... + 12377.

It is an arithmetic number, because the mean of its divisors is an integer number (10392696).

Almost surely, 2^72637733 is an apocalyptic number.

It is an amenable number.

72637733 is a deficient number, since it is larger than the sum of its proper divisors (10503835).

72637733 is a wasteful number, since it uses less digits than its factorization.

72637733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15883.

The product of its digits is 111132, while the sum is 38.

The square root of 72637733 is about 8522.7773055501. Note that the first 3 decimals coincide. The cubic root of 72637733 is about 417.2414319210.

The spelling of 72637733 in words is "seventy-two million, six hundred thirty-seven thousand, seven hundred thirty-three".