79543978 has 16 divisors (see below), whose sum is σ = 120504384. Its totient is φ = 39378240.

The previous prime is 79543973. The next prime is 79543979. The reversal of 79543978 is 87934597.

It is not an unprimeable number, because it can be changed into a prime (79543973) 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 7 ways as a sum of consecutive naturals, for example, 109051 + ... + 109777.

It is an arithmetic number, because the mean of its divisors is an integer number (7531524).

Almost surely, 2^79543978 is an apocalyptic number.

79543978 is a deficient number, since it is larger than the sum of its proper divisors (40960406).

79543978 is a wasteful number, since it uses less digits than its factorization.

79543978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197.

The product of its digits is 1905120, while the sum is 52.

The square root of 79543978 is about 8918.7430728775. The cubic root of 79543978 is about 430.0666527290.

The spelling of 79543978 in words is "seventy-nine million, five hundred forty-three thousand, nine hundred seventy-eight".