72164999 has 8 divisors (see below), whose sum is σ = 73416000. Its totient is φ = 70922592.

The previous prime is 72164987. The next prime is 72165001. The reversal of 72164999 is 99946127.

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 72164999 - 2¹⁶ = 72099463 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 (72164699) 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, 16097 + ... + 20085.

It is an arithmetic number, because the mean of its divisors is an integer number (9177000).

Almost surely, 2^72164999 is an apocalyptic number.

72164999 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

72164999 is a deficient number, since it is larger than the sum of its proper divisors (1251001).

72164999 is a wasteful number, since it uses less digits than its factorization.

72164999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297.

The product of its digits is 244944, while the sum is 47.

The square root of 72164999 is about 8494.9984696879. The cubic root of 72164999 is about 416.3343108233.

The spelling of 72164999 in words is "seventy-two million, one hundred sixty-four thousand, nine hundred ninety-nine".