79991950 has 12 divisors (see below), whose sum is σ = 148785120. Its totient is φ = 31996760.

The previous prime is 79991941. The next prime is 79991969. The reversal of 79991950 is 5919997.

It is a junction number, because it is equal to n+sod(n) for n = 79991894 and 79991903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 799870 + ... + 799969.

It is an arithmetic number, because the mean of its divisors is an integer number (12398760).

Almost surely, 2^79991950 is an apocalyptic number.

79991950 is a deficient number, since it is larger than the sum of its proper divisors (68793170).

79991950 is a wasteful number, since it uses less digits than its factorization.

79991950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599851 (or 1599846 counting only the distinct ones).

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 79991950 is about 8943.8218899976. The cubic root of 79991950 is about 430.8724848555.

The spelling of 79991950 in words is "seventy-nine million, nine hundred ninety-one thousand, nine hundred fifty".