79563421 has 8 divisors (see below), whose sum is σ = 91078784. Its totient is φ = 68085360.

The previous prime is 79563401. The next prime is 79563439. The reversal of 79563421 is 12436597.

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

It is not a de Polignac number, because 79563421 - 2⁵ = 79563389 is a prime.

It is a super-2 number, since 2×79563421² = 12660675922446482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79563401) 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, 4590 + ... + 13423.

It is an arithmetic number, because the mean of its divisors is an integer number (11384848).

Almost surely, 2^79563421 is an apocalyptic number.

It is an amenable number.

79563421 is a deficient number, since it is larger than the sum of its proper divisors (11515363).

79563421 is a wasteful number, since it uses less digits than its factorization.

79563421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18651.

The product of its digits is 45360, while the sum is 37.

The square root of 79563421 is about 8919.8330141320. The cubic root of 79563421 is about 430.1016903897.

The spelling of 79563421 in words is "seventy-nine million, five hundred sixty-three thousand, four hundred twenty-one".