78890783 has 4 divisors (see below), whose sum is σ = 79084080. Its totient is φ = 78697488.

The previous prime is 78890741. The next prime is 78890809. The reversal of 78890783 is 38709887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38709887 = 97 ⋅399071.

It is a cyclic number.

It is not a de Polignac number, because 78890783 - 2⁶ = 78890719 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 (78890083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96035 + ... + 96852.

It is an arithmetic number, because the mean of its divisors is an integer number (19771020).

Almost surely, 2^78890783 is an apocalyptic number.

78890783 is a deficient number, since it is larger than the sum of its proper divisors (193297).

78890783 is a wasteful number, since it uses less digits than its factorization.

78890783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193296.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 78890783 is about 8882.0483560944. The cubic root of 78890783 is about 428.8862161855.

The spelling of 78890783 in words is "seventy-eight million, eight hundred ninety thousand, seven hundred eighty-three".