79404429 has 16 divisors (see below), whose sum is σ = 115068800. Its totient is φ = 48413376.

The previous prime is 79404421. The next prime is 79404449. The reversal of 79404429 is 92440497.

It is a happy number.

It is not a de Polignac number, because 79404429 - 2³ = 79404421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79404421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5089 + ... + 13590.

It is an arithmetic number, because the mean of its divisors is an integer number (7191800).

Almost surely, 2^79404429 is an apocalyptic number.

It is an amenable number.

79404429 is a deficient number, since it is larger than the sum of its proper divisors (35664371).

79404429 is a wasteful number, since it uses less digits than its factorization.

79404429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18804.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 79404429 is about 8910.9162828522. The cubic root of 79404429 is about 429.8150078598.

The spelling of 79404429 in words is "seventy-nine million, four hundred four thousand, four hundred twenty-nine".