79619994 has 36 divisors (see below), whose sum is σ = 182082186. Its totient is φ = 25141104.

The previous prime is 79619987. The next prime is 79620007. The reversal of 79619994 is 49991697.

It can be written as a sum of positive squares in only one way, i.e., 68310225 + 11309769 = 8265^2 + 3363^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 79619994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 372 + ... + 12624.

Almost surely, 2^79619994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79619994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91041093).

79619994 is an abundant number, since it is smaller than the sum of its proper divisors (102462192).

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

79619994 is a wasteful number, since it uses less digits than its factorization.

79619994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12299 (or 12277 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 79619994 is about 8923.0036422720. The cubic root of 79619994 is about 430.2036064789.

It can be divided in two parts, 7961 and 9994, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 79619994 in words is "seventy-nine million, six hundred nineteen thousand, nine hundred ninety-four".