78957783 has 12 divisors (see below), whose sum is σ = 114242440. Its totient is φ = 52549776.

The previous prime is 78957773. The next prime is 78957793. The reversal of 78957783 is 38775987.

It is an interprime number because it is at equal distance from previous prime (78957773) and next prime (78957793).

It is not a de Polignac number, because 78957783 - 2⁹ = 78957271 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 (78957763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1516 + ... + 12657.

Almost surely, 2^78957783 is an apocalyptic number.

78957783 is a deficient number, since it is larger than the sum of its proper divisors (35284657).

78957783 is a wasteful number, since it uses less digits than its factorization.

78957783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14798 (or 14795 counting only the distinct ones).

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

The square root of 78957783 is about 8885.8192081541. The cubic root of 78957783 is about 429.0075959990.

The spelling of 78957783 in words is "seventy-eight million, nine hundred fifty-seven thousand, seven hundred eighty-three".