72090979 has 8 divisors (see below), whose sum is σ = 74142000. Its totient is φ = 70067712.

The previous prime is 72090973. The next prime is 72090983. The reversal of 72090979 is 97909027.

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 72090979 - 2¹¹ = 72088931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72090973) 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, 1614 + ... + 12115.

It is an arithmetic number, because the mean of its divisors is an integer number (9267750).

Almost surely, 2^72090979 is an apocalyptic number.

72090979 is a deficient number, since it is larger than the sum of its proper divisors (2051021).

72090979 is a wasteful number, since it uses less digits than its factorization.

72090979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13877.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 72090979 is about 8490.6406707621. The cubic root of 72090979 is about 416.1919167332.

The spelling of 72090979 in words is "seventy-two million, ninety thousand, nine hundred seventy-nine".