72637143 has 4 divisors (see below), whose sum is σ = 96849528. Its totient is φ = 48424760.

The previous prime is 72637139. The next prime is 72637183. The reversal of 72637143 is 34173627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72637143 - 2² = 72637139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72637183) 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, 12106188 + ... + 12106193.

It is an arithmetic number, because the mean of its divisors is an integer number (24212382).

Almost surely, 2^72637143 is an apocalyptic number.

72637143 is a deficient number, since it is larger than the sum of its proper divisors (24212385).

72637143 is a wasteful number, since it uses less digits than its factorization.

72637143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24212384.

The product of its digits is 21168, while the sum is 33.

The square root of 72637143 is about 8522.7426923497. The cubic root of 72637143 is about 417.2403022367.

The spelling of 72637143 in words is "seventy-two million, six hundred thirty-seven thousand, one hundred forty-three".