72537173 has 8 divisors (see below), whose sum is σ = 74609568. Its totient is φ = 70482384.

The previous prime is 72537167. The next prime is 72537191. The reversal of 72537173 is 37173527.

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 72537173 - 2¹² = 72533077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72537133) 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, 4190 + ... + 12752.

It is an arithmetic number, because the mean of its divisors is an integer number (9326196).

Almost surely, 2^72537173 is an apocalyptic number.

It is an amenable number.

72537173 is a deficient number, since it is larger than the sum of its proper divisors (2072395).

72537173 is a wasteful number, since it uses less digits than its factorization.

72537173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8803.

The product of its digits is 30870, while the sum is 35.

The square root of 72537173 is about 8516.8757769501. The cubic root of 72537173 is about 417.0487993697.

The spelling of 72537173 in words is "seventy-two million, five hundred thirty-seven thousand, one hundred seventy-three".