79378889 has 4 divisors (see below), whose sum is σ = 79424256. Its totient is φ = 79333524.

The previous prime is 79378867. The next prime is 79378891. The reversal of 79378889 is 98887397.

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 79378889 - 2⁸ = 79378633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79377889) 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, 19949 + ... + 23594.

It is an arithmetic number, because the mean of its divisors is an integer number (19856064).

Almost surely, 2^79378889 is an apocalyptic number.

It is an amenable number.

79378889 is a deficient number, since it is larger than the sum of its proper divisors (45367).

79378889 is a wasteful number, since it uses less digits than its factorization.

79378889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45366.

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

The square root of 79378889 is about 8909.4830938725. The cubic root of 79378889 is about 429.7689203699.

The spelling of 79378889 in words is "seventy-nine million, three hundred seventy-eight thousand, eight hundred eighty-nine".