79343021 has 4 divisors (see below), whose sum is σ = 79829952. Its totient is φ = 78856092.

The previous prime is 79343009. The next prime is 79343051. The reversal of 79343021 is 12034397.

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 79343021 - 2⁶ = 79342957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79343051) 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, 243221 + ... + 243546.

It is an arithmetic number, because the mean of its divisors is an integer number (19957488).

Almost surely, 2^79343021 is an apocalyptic number.

It is an amenable number.

79343021 is a deficient number, since it is larger than the sum of its proper divisors (486931).

79343021 is a wasteful number, since it uses less digits than its factorization.

79343021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486930.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 79343021 is about 8907.4699550434. The cubic root of 79343021 is about 429.7041790841.

The spelling of 79343021 in words is "seventy-nine million, three hundred forty-three thousand, twenty-one".