79988837 has 4 divisors (see below), whose sum is σ = 81344640. Its totient is φ = 78633036.

The previous prime is 79988807. The next prime is 79988849. The reversal of 79988837 is 73888997.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79988837 - 2¹⁸ = 79726693 is a prime.

It is a super-2 number, since 2×79988837² = 12796428089225138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59), and also a Moran number because the ratio is a prime number: 1355743 = 79988837 / (7 + 9 + 9 + 8 + 8 + 8 + 3 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79988807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677813 + ... + 677930.

It is an arithmetic number, because the mean of its divisors is an integer number (20336160).

Almost surely, 2^79988837 is an apocalyptic number.

It is an amenable number.

79988837 is a deficient number, since it is larger than the sum of its proper divisors (1355803).

79988837 is a wasteful number, since it uses less digits than its factorization.

79988837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355802.

The product of its digits is 6096384, while the sum is 59.

The square root of 79988837 is about 8943.6478575579. The cubic root of 79988837 is about 430.8668954454.

The spelling of 79988837 in words is "seventy-nine million, nine hundred eighty-eight thousand, eight hundred thirty-seven".