78733793 has 2 divisors, whose sum is σ = 78733794. Its totient is φ = 78733792.

The previous prime is 78733757. The next prime is 78733801. The reversal of 78733793 is 39733787.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 10291264 = 8273^2 + 3208^2 .

It is an emirp because it is prime and its reverse (39733787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78733793 - 2¹⁰ = 78732769 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78732793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39366896 + 39366897.

It is an arithmetic number, because the mean of its divisors is an integer number (39366897).

Almost surely, 2^78733793 is an apocalyptic number.

It is an amenable number.

78733793 is a deficient number, since it is larger than the sum of its proper divisors (1).

78733793 is an equidigital number, since it uses as much as digits as its factorization.

78733793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 666792, while the sum is 47.

The square root of 78733793 is about 8873.2064666613. The cubic root of 78733793 is about 428.6015375619.

The spelling of 78733793 in words is "seventy-eight million, seven hundred thirty-three thousand, seven hundred ninety-three".