72164998 has 4 divisors (see below), whose sum is σ = 108247500. Its totient is φ = 36082498.

The previous prime is 72164987. The next prime is 72165001. The reversal of 72164998 is 89946127.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18041248 + ... + 18041251.

It is an arithmetic number, because the mean of its divisors is an integer number (27061875).

Almost surely, 2^72164998 is an apocalyptic number.

72164998 is a deficient number, since it is larger than the sum of its proper divisors (36082502).

72164998 is a wasteful number, since it uses less digits than its factorization.

72164998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36082501.

The product of its digits is 217728, while the sum is 46.

The square root of 72164998 is about 8494.9984108298. The cubic root of 72164998 is about 416.3343089002.

The spelling of 72164998 in words is "seventy-two million, one hundred sixty-four thousand, nine hundred ninety-eight".