79823897 has 4 divisors (see below), whose sum is σ = 79842000. Its totient is φ = 79805796.

The previous prime is 79823893. The next prime is 79823899. The reversal of 79823897 is 79832897.

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 79823897 - 2² = 79823893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79823893) 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, 2354 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (19960500).

Almost surely, 2^79823897 is an apocalyptic number.

It is an amenable number.

79823897 is a deficient number, since it is larger than the sum of its proper divisors (18103).

79823897 is a wasteful number, since it uses less digits than its factorization.

79823897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18102.

The product of its digits is 1524096, while the sum is 53.

The square root of 79823897 is about 8934.4220294320. The cubic root of 79823897 is about 430.5705370527.

The spelling of 79823897 in words is "seventy-nine million, eight hundred twenty-three thousand, eight hundred ninety-seven".