78732793 has 2 divisors, whose sum is σ = 78732794. Its totient is φ = 78732792.

The previous prime is 78732791. The next prime is 78732799. The reversal of 78732793 is 39723787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 7634169 = 8432^2 + 2763^2 .

It is a cyclic number.

It is not a de Polignac number, because 78732793 - 2¹ = 78732791 is a prime.

Together with 78732791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78732791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39366396 + 39366397.

It is an arithmetic number, because the mean of its divisors is an integer number (39366397).

Almost surely, 2^78732793 is an apocalyptic number.

It is an amenable number.

78732793 is a deficient number, since it is larger than the sum of its proper divisors (1).

78732793 is an equidigital number, since it uses as much as digits as its factorization.

78732793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 46.

The square root of 78732793 is about 8873.1501170667. The cubic root of 78732793 is about 428.5997229944.

The spelling of 78732793 in words is "seventy-eight million, seven hundred thirty-two thousand, seven hundred ninety-three".