72746173 has 4 divisors (see below), whose sum is σ = 72772960. Its totient is φ = 72719388.

The previous prime is 72746161. The next prime is 72746189. The reversal of 72746173 is 37164727.

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 a cyclic number.

It is not a de Polignac number, because 72746173 - 2²⁵ = 39191741 is a prime.

It is a super-2 number, since 2×72746173² = 10584011372291858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72746143) 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, 8793 + ... + 14926.

It is an arithmetic number, because the mean of its divisors is an integer number (18193240).

Almost surely, 2^72746173 is an apocalyptic number.

It is an amenable number.

72746173 is a deficient number, since it is larger than the sum of its proper divisors (26787).

72746173 is a wasteful number, since it uses less digits than its factorization.

72746173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26786.

The product of its digits is 49392, while the sum is 37.

The square root of 72746173 is about 8529.1367089524. The cubic root of 72746173 is about 417.4489602587.

The spelling of 72746173 in words is "seventy-two million, seven hundred forty-six thousand, one hundred seventy-three".