78379893 has 16 divisors (see below), whose sum is σ = 117555200. Its totient is φ = 52251804.

The previous prime is 78379891. The next prime is 78379901. The reversal of 78379893 is 39897387.

It is not a de Polignac number, because 78379893 - 2¹ = 78379891 is a prime.

It is a super-2 number, since 2×78379893² = 12286815253382898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78379891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15733 + ... + 20106.

It is an arithmetic number, because the mean of its divisors is an integer number (7347200).

Almost surely, 2^78379893 is an apocalyptic number.

It is an amenable number.

78379893 is a deficient number, since it is larger than the sum of its proper divisors (39175307).

78379893 is an frugal number, since it uses more digits than its factorization.

78379893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35860 (or 35842 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 78379893 is about 8853.2419485745. The cubic root of 78379893 is about 427.9584002570.

The spelling of 78379893 in words is "seventy-eight million, three hundred seventy-nine thousand, eight hundred ninety-three".