72137534 has 8 divisors (see below), whose sum is σ = 123664368. Its totient is φ = 30916080.

The previous prime is 72137521. The next prime is 72137539. The reversal of 72137534 is 43573127.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72137534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72137539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2576327 + ... + 2576354.

It is an arithmetic number, because the mean of its divisors is an integer number (15458046).

Almost surely, 2^72137534 is an apocalyptic number.

72137534 is a deficient number, since it is larger than the sum of its proper divisors (51526834).

72137534 is a wasteful number, since it uses less digits than its factorization.

72137534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152690.

The product of its digits is 17640, while the sum is 32.

The square root of 72137534 is about 8493.3817764186. The cubic root of 72137534 is about 416.2814870956.

The spelling of 72137534 in words is "seventy-two million, one hundred thirty-seven thousand, five hundred thirty-four".