72100379 has 8 divisors (see below), whose sum is σ = 79452912. Its totient is φ = 65005920.

The previous prime is 72100373. The next prime is 72100393. The reversal of 72100379 is 97300127.

It is a happy number.

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 72100379 - 2⁸ = 72100123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72100373) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 63932 + ... + 65049.

It is an arithmetic number, because the mean of its divisors is an integer number (9931614).

Almost surely, 2^72100379 is an apocalyptic number.

72100379 is a deficient number, since it is larger than the sum of its proper divisors (7352533).

72100379 is a wasteful number, since it uses less digits than its factorization.

72100379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129037.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 72100379 is about 8491.1942034086. The cubic root of 72100379 is about 416.2100051452.

The spelling of 72100379 in words is "seventy-two million, one hundred thousand, three hundred seventy-nine".