79395421 has 4 divisors (see below), whose sum is σ = 90737632. Its totient is φ = 68053212.

The previous prime is 79395413. The next prime is 79395427. The reversal of 79395421 is 12459397.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12459397 = 823 ⋅15139.

It is a cyclic number.

It is not a de Polignac number, because 79395421 - 2³ = 79395413 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 (79395427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5671095 + ... + 5671108.

It is an arithmetic number, because the mean of its divisors is an integer number (22684408).

Almost surely, 2^79395421 is an apocalyptic number.

It is an amenable number.

79395421 is a deficient number, since it is larger than the sum of its proper divisors (11342211).

79395421 is a wasteful number, since it uses less digits than its factorization.

79395421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11342210.

The product of its digits is 68040, while the sum is 40.

The square root of 79395421 is about 8910.4108210565. The cubic root of 79395421 is about 429.7987538546.

The spelling of 79395421 in words is "seventy-nine million, three hundred ninety-five thousand, four hundred twenty-one".