78957283 has 4 divisors (see below), whose sum is σ = 79236568. Its totient is φ = 78678000.

The previous prime is 78957271. The next prime is 78957313. The reversal of 78957283 is 38275987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38275987 = 1667 ⋅22961.

It is a cyclic number.

It is not a de Polignac number, because 78957283 - 2²¹ = 76860131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78957253) 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, 139218 + ... + 139783.

It is an arithmetic number, because the mean of its divisors is an integer number (19809142).

Almost surely, 2^78957283 is an apocalyptic number.

78957283 is a deficient number, since it is larger than the sum of its proper divisors (279285).

78957283 is a wasteful number, since it uses less digits than its factorization.

78957283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279284.

The product of its digits is 846720, while the sum is 49.

The square root of 78957283 is about 8885.7910733935. The cubic root of 78957283 is about 429.0066904338.

The spelling of 78957283 in words is "seventy-eight million, nine hundred fifty-seven thousand, two hundred eighty-three".