72249179 has 4 divisors (see below), whose sum is σ = 74740560. Its totient is φ = 69757800.

The previous prime is 72249169. The next prime is 72249181. The reversal of 72249179 is 97194227.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72249179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72249119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1245647 + ... + 1245704.

It is an arithmetic number, because the mean of its divisors is an integer number (18685140).

Almost surely, 2^72249179 is an apocalyptic number.

72249179 is a deficient number, since it is larger than the sum of its proper divisors (2491381).

72249179 is a wasteful number, since it uses less digits than its factorization.

72249179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491380.

The product of its digits is 63504, while the sum is 41.

The square root of 72249179 is about 8499.9517057452. The cubic root of 72249179 is about 416.4961316701.

The spelling of 72249179 in words is "seventy-two million, two hundred forty-nine thousand, one hundred seventy-nine".