72179157 has 8 divisors (see below), whose sum is σ = 101304160. Its totient is φ = 45586800.

The previous prime is 72179143. The next prime is 72179183. The reversal of 72179157 is 75197127.

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

It is not a de Polignac number, because 72179157 - 2⁴ = 72179141 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 (72179117) 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, 633094 + ... + 633207.

It is an arithmetic number, because the mean of its divisors is an integer number (12663020).

Almost surely, 2^72179157 is an apocalyptic number.

It is an amenable number.

72179157 is a deficient number, since it is larger than the sum of its proper divisors (29125003).

72179157 is a wasteful number, since it uses less digits than its factorization.

72179157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266323.

The product of its digits is 30870, while the sum is 39.

The square root of 72179157 is about 8495.8317426842. The cubic root of 72179157 is about 416.3615358207.

The spelling of 72179157 in words is "seventy-two million, one hundred seventy-nine thousand, one hundred fifty-seven".