72155929 has 8 divisors (see below), whose sum is σ = 73536320. Its totient is φ = 70788816.

The previous prime is 72155927. The next prime is 72155933. The reversal of 72155929 is 92955127.

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 72155929 - 2¹ = 72155927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72155891 and 72155900.

It is not an unprimeable number, because it can be changed into a prime (72155921) 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, 8014 + ... + 14440.

It is an arithmetic number, because the mean of its divisors is an integer number (9192040).

Almost surely, 2^72155929 is an apocalyptic number.

It is an amenable number.

72155929 is a deficient number, since it is larger than the sum of its proper divisors (1380391).

72155929 is a wasteful number, since it uses less digits than its factorization.

72155929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639.

The product of its digits is 56700, while the sum is 40.

The square root of 72155929 is about 8494.4646093795. The cubic root of 72155929 is about 416.3168678779.

The spelling of 72155929 in words is "seventy-two million, one hundred fifty-five thousand, nine hundred twenty-nine".