78940793 has 2 divisors, whose sum is σ = 78940794. Its totient is φ = 78940792.

The previous prime is 78940789. The next prime is 78940817. The reversal of 78940793 is 39704987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 33674809 = 6728^2 + 5803^2 .

It is a cyclic number.

It is not a de Polignac number, because 78940793 - 2² = 78940789 is a prime.

It is not a weakly prime, because it can be changed into another prime (78940723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39470396 + 39470397.

It is an arithmetic number, because the mean of its divisors is an integer number (39470397).

Almost surely, 2^78940793 is an apocalyptic number.

It is an amenable number.

78940793 is a deficient number, since it is larger than the sum of its proper divisors (1).

78940793 is an equidigital number, since it uses as much as digits as its factorization.

78940793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 78940793 is about 8884.8631390697. The cubic root of 78940793 is about 428.9768227526.

The spelling of 78940793 in words is "seventy-eight million, nine hundred forty thousand, seven hundred ninety-three".