79023421 has 2 divisors, whose sum is σ = 79023422. Its totient is φ = 79023420.

The previous prime is 79023409. The next prime is 79023431. The reversal of 79023421 is 12432097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41139396 + 37884025 = 6414^2 + 6155^2 .

It is a cyclic number.

It is not a de Polignac number, because 79023421 - 2⁵ = 79023389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79023421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79023431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39511710 + 39511711.

It is an arithmetic number, because the mean of its divisors is an integer number (39511711).

Almost surely, 2^79023421 is an apocalyptic number.

It is an amenable number.

79023421 is a deficient number, since it is larger than the sum of its proper divisors (1).

79023421 is an equidigital number, since it uses as much as digits as its factorization.

79023421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 79023421 is about 8889.5118538646. The cubic root of 79023421 is about 429.1264417929.

The spelling of 79023421 in words is "seventy-nine million, twenty-three thousand, four hundred twenty-one".