79743421 has 4 divisors (see below), whose sum is σ = 79813152. Its totient is φ = 79673692.

The previous prime is 79743403. The next prime is 79743431. The reversal of 79743421 is 12434797.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79743421 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 (79743431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33121 + ... + 35446.

It is an arithmetic number, because the mean of its divisors is an integer number (19953288).

Almost surely, 2^79743421 is an apocalyptic number.

It is an amenable number.

79743421 is a deficient number, since it is larger than the sum of its proper divisors (69731).

79743421 is a wasteful number, since it uses less digits than its factorization.

79743421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69730.

The product of its digits is 42336, while the sum is 37.

The square root of 79743421 is about 8929.9171888658. The cubic root of 79743421 is about 430.4257924047.

The spelling of 79743421 in words is "seventy-nine million, seven hundred forty-three thousand, four hundred twenty-one".