79430021 has 8 divisors (see below), whose sum is σ = 87276000. Its totient is φ = 71688240.

The previous prime is 79430011. The next prime is 79430033. The reversal of 79430021 is 12003497.

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 79430021 - 2¹⁰ = 79428997 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 (79430011) 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, 24446 + ... + 27503.

It is an arithmetic number, because the mean of its divisors is an integer number (10909500).

Almost surely, 2^79430021 is an apocalyptic number.

It is an amenable number.

79430021 is a deficient number, since it is larger than the sum of its proper divisors (7845979).

79430021 is a wasteful number, since it uses less digits than its factorization.

79430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52099.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 79430021 is about 8912.3521586616. The cubic root of 79430021 is about 429.8611792732.

The spelling of 79430021 in words is "seventy-nine million, four hundred thirty thousand, twenty-one".