79961630 has 48 divisors (see below), whose sum is σ = 170644320. Its totient is φ = 26889408.

The previous prime is 79961621. The next prime is 79961653. The reversal of 79961630 is 3616997.

It is a happy number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24431 + ... + 27509.

It is an arithmetic number, because the mean of its divisors is an integer number (3555090).

Almost surely, 2^79961630 is an apocalyptic number.

79961630 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

79961630 is an abundant number, since it is smaller than the sum of its proper divisors (90682690).

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

79961630 is a wasteful number, since it uses less digits than its factorization.

79961630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153 (or 3146 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 79961630 is about 8942.1267045373. The cubic root of 79961630 is about 430.8180389408.

The spelling of 79961630 in words is "seventy-nine million, nine hundred sixty-one thousand, six hundred thirty".