79893639897 has 4 divisors (see below), whose sum is σ = 106524853200. Its totient is φ = 53262426596.

The previous prime is 79893639877. The next prime is 79893639899.

79893639897 is nontrivially palindromic in base 10.

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 79893639897 - 2⁷ = 79893639769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79893639899) 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, 13315606647 + ... + 13315606652.

It is an arithmetic number, because the mean of its divisors is an integer number (26631213300).

Almost surely, 2^79893639897 is an apocalyptic number.

It is an amenable number.

79893639897 is a deficient number, since it is larger than the sum of its proper divisors (26631213303).

79893639897 is a wasteful number, since it uses less digits than its factorization.

79893639897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26631213302.

The product of its digits is 1111065984, while the sum is 78.

The spelling of 79893639897 in words is "seventy-nine billion, eight hundred ninety-three million, six hundred thirty-nine thousand, eight hundred ninety-seven".