78491013 has 8 divisors (see below), whose sum is σ = 104786976. Its totient is φ = 52261200.

The previous prime is 78491011. The next prime is 78491029. The reversal of 78491013 is 31019487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78491013 - 2¹ = 78491011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78491011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13698 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (13098372).

Almost surely, 2^78491013 is an apocalyptic number.

It is an amenable number.

78491013 is a deficient number, since it is larger than the sum of its proper divisors (26295963).

78491013 is a wasteful number, since it uses less digits than its factorization.

78491013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33075.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 78491013 is about 8859.5153930675. The cubic root of 78491013 is about 428.1605451369.

The spelling of 78491013 in words is "seventy-eight million, four hundred ninety-one thousand, thirteen".