72718773 has 4 divisors (see below), whose sum is σ = 96958368. Its totient is φ = 48479180.

The previous prime is 72718759. The next prime is 72718787. The reversal of 72718773 is 37781727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (72718759) and next prime (72718787).

It is a cyclic number.

It is not a de Polignac number, because 72718773 - 2²⁰ = 71670197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72710773) 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, 12119793 + ... + 12119798.

It is an arithmetic number, because the mean of its divisors is an integer number (24239592).

Almost surely, 2^72718773 is an apocalyptic number.

It is an amenable number.

72718773 is a deficient number, since it is larger than the sum of its proper divisors (24239595).

72718773 is a wasteful number, since it uses less digits than its factorization.

72718773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24239594.

The product of its digits is 115248, while the sum is 42.

The square root of 72718773 is about 8527.5302989787. The cubic root of 72718773 is about 417.3965426657.

The spelling of 72718773 in words is "seventy-two million, seven hundred eighteen thousand, seven hundred seventy-three".