78783579 has 24 divisors (see below), whose sum is σ = 135712512. Its totient is φ = 43061040.

The previous prime is 78783547. The next prime is 78783581. The reversal of 78783579 is 97538787.

It is not a de Polignac number, because 78783579 - 2⁵ = 78783547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78783539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25737 + ... + 28634.

It is an arithmetic number, because the mean of its divisors is an integer number (5654688).

Almost surely, 2^78783579 is an apocalyptic number.

78783579 is a deficient number, since it is larger than the sum of its proper divisors (56928933).

78783579 is a wasteful number, since it uses less digits than its factorization.

78783579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54407 (or 54404 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 78783579 is about 8876.0114353239. The cubic root of 78783579 is about 428.6918582034.

The spelling of 78783579 in words is "seventy-eight million, seven hundred eighty-three thousand, five hundred seventy-nine".