72154399 has 8 divisors (see below), whose sum is σ = 73554320. Its totient is φ = 70761600.

The previous prime is 72154393. The next prime is 72154421. The reversal of 72154399 is 99345127.

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 72154399 - 2⁵ = 72154367 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 (72154393) 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, 21559 + ... + 24679.

It is an arithmetic number, because the mean of its divisors is an integer number (9194290).

Almost surely, 2^72154399 is an apocalyptic number.

72154399 is a deficient number, since it is larger than the sum of its proper divisors (1399921).

72154399 is a wasteful number, since it uses less digits than its factorization.

72154399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561.

The product of its digits is 68040, while the sum is 40.

The square root of 72154399 is about 8494.3745502538. The cubic root of 72154399 is about 416.3139253185.

The spelling of 72154399 in words is "seventy-two million, one hundred fifty-four thousand, three hundred ninety-nine".