79969500 has 144 divisors (see below), whose sum is σ = 271881792. Its totient is φ = 19670400.

The previous prime is 79969493. The next prime is 79969517. The reversal of 79969500 is 596997.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57817 + ... + 59183.

It is an arithmetic number, because the mean of its divisors is an integer number (1888068).

Almost surely, 2^79969500 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 79969500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135940896).

79969500 is an abundant number, since it is smaller than the sum of its proper divisors (191912292).

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

79969500 is a wasteful number, since it uses less digits than its factorization.

79969500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 79969500 is about 8942.5667456273. The cubic root of 79969500 is about 430.8321724976.

The spelling of 79969500 in words is "seventy-nine million, nine hundred sixty-nine thousand, five hundred".