79569421 has 8 divisors (see below), whose sum is σ = 80139488. Its totient is φ = 79002000.

The previous prime is 79569419. The next prime is 79569431. The reversal of 79569421 is 12496597.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79569421 - 2¹ = 79569419 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 (79569431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139066 + ... + 139636.

It is an arithmetic number, because the mean of its divisors is an integer number (10017436).

Almost surely, 2^79569421 is an apocalyptic number.

It is an amenable number.

79569421 is a deficient number, since it is larger than the sum of its proper divisors (570067).

79569421 is a wasteful number, since it uses less digits than its factorization.

79569421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323.

The product of its digits is 136080, while the sum is 43.

The square root of 79569421 is about 8920.1693369577. The cubic root of 79569421 is about 430.1125016613.

The spelling of 79569421 in words is "seventy-nine million, five hundred sixty-nine thousand, four hundred twenty-one".