79000000 has 98 divisors (see below), whose sum is σ = 198434960. Its totient is φ = 31200000.

The previous prime is 78999979. The next prime is 79000007. The reversal of 79000000 is 97.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79000007) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 999961 + ... + 1000039.

Almost surely, 2^79000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99217480).

79000000 is an abundant number, since it is smaller than the sum of its proper divisors (119434960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79000000 is an frugal number, since it uses more digits than its factorization.

79000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 79000000 is about 8888.1944173156. The cubic root of 79000000 is about 429.0840427026.

Adding to 79000000 its reverse (97), we get a palindrome (79000097).

The spelling of 79000000 in words is "seventy-nine million", and thus it is an aban number and an uban number.