72402079 has 4 divisors (see below), whose sum is σ = 72726976. Its totient is φ = 72077184.

The previous prime is 72402073. The next prime is 72402089. The reversal of 72402079 is 97020427.

It is a happy number.

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-72402079 is a prime.

It is a super-2 number, since 2×72402079² = 10484122087044482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72402079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72402073) 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, 162114 + ... + 162559.

It is an arithmetic number, because the mean of its divisors is an integer number (18181744).

Almost surely, 2^72402079 is an apocalyptic number.

72402079 is a deficient number, since it is larger than the sum of its proper divisors (324897).

72402079 is a wasteful number, since it uses less digits than its factorization.

72402079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324896.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 72402079 is about 8508.9411209621. The cubic root of 72402079 is about 416.7897331054.

The spelling of 72402079 in words is "seventy-two million, four hundred two thousand, seventy-nine".