79389812 has 6 divisors (see below), whose sum is σ = 138932178. Its totient is φ = 39694904.

The previous prime is 79389811. The next prime is 79389829. The reversal of 79389812 is 21898397.

It can be written as a sum of positive squares in only one way, i.e., 70123876 + 9265936 = 8374^2 + 3044^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79389811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9923723 + ... + 9923730.

It is an arithmetic number, because the mean of its divisors is an integer number (23155363).

Almost surely, 2^79389812 is an apocalyptic number.

It is an amenable number.

79389812 is a deficient number, since it is larger than the sum of its proper divisors (59542366).

79389812 is a wasteful number, since it uses less digits than its factorization.

79389812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19847457 (or 19847455 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 79389812 is about 8910.0960713115. The cubic root of 79389812 is about 429.7886323725.

The spelling of 79389812 in words is "seventy-nine million, three hundred eighty-nine thousand, eight hundred twelve".