79801478 has 4 divisors (see below), whose sum is σ = 119702220. Its totient is φ = 39900738.

The previous prime is 79801459. The next prime is 79801487. The reversal of 79801478 is 87410897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87410897 = 7 ⋅12487271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19950368 + ... + 19950371.

It is an arithmetic number, because the mean of its divisors is an integer number (29925555).

Almost surely, 2^79801478 is an apocalyptic number.

79801478 is a deficient number, since it is larger than the sum of its proper divisors (39900742).

79801478 is a wasteful number, since it uses less digits than its factorization.

79801478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39900741.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 79801478 is about 8933.1672994521. The cubic root of 79801478 is about 430.5302238755.

The spelling of 79801478 in words is "seventy-nine million, eight hundred one thousand, four hundred seventy-eight".