79878429 has 12 divisors (see below), whose sum is σ = 116262432. Its totient is φ = 52845000.

The previous prime is 79878397. The next prime is 79878437. The reversal of 79878429 is 92487897.

It is not a de Polignac number, because 79878429 - 2⁵ = 79878397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79878229) 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 11 ways as a sum of consecutive naturals, for example, 32697 + ... + 35054.

It is an arithmetic number, because the mean of its divisors is an integer number (9688536).

Almost surely, 2^79878429 is an apocalyptic number.

It is an amenable number.

79878429 is a deficient number, since it is larger than the sum of its proper divisors (36384003).

79878429 is a wasteful number, since it uses less digits than its factorization.

79878429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67888 (or 67885 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 79878429 is about 8937.4733006594. The cubic root of 79878429 is about 430.6685633691.

The spelling of 79878429 in words is "seventy-nine million, eight hundred seventy-eight thousand, four hundred twenty-nine".