78791101 has 4 divisors (see below), whose sum is σ = 79263072. Its totient is φ = 78319132.

The previous prime is 78791099. The next prime is 78791113. The reversal of 78791101 is 10119787.

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 not a de Polignac number, because 78791101 - 2¹ = 78791099 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 (78791131) 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, 235735 + ... + 236068.

It is an arithmetic number, because the mean of its divisors is an integer number (19815768).

Almost surely, 2^78791101 is an apocalyptic number.

It is an amenable number.

78791101 is a deficient number, since it is larger than the sum of its proper divisors (471971).

78791101 is a wasteful number, since it uses less digits than its factorization.

78791101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471970.

The product of its (nonzero) digits is 3528, while the sum is 34.

The square root of 78791101 is about 8876.4351515684. The cubic root of 78791101 is about 428.7055011376.

The spelling of 78791101 in words is "seventy-eight million, seven hundred ninety-one thousand, one hundred one".