788090813 has 2 divisors, whose sum is σ = 788090814. Its totient is φ = 788090812.

The previous prime is 788090767. The next prime is 788090881. The reversal of 788090813 is 318090887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407918809 + 380172004 = 20197^2 + 19498^2 .

It is a cyclic number.

It is not a de Polignac number, because 788090813 - 2⁶ = 788090749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (788690813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394045406 + 394045407.

It is an arithmetic number, because the mean of its divisors is an integer number (394045407).

Almost surely, 2^788090813 is an apocalyptic number.

It is an amenable number.

788090813 is a deficient number, since it is larger than the sum of its proper divisors (1).

788090813 is an equidigital number, since it uses as much as digits as its factorization.

788090813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 788090813 is about 28072.9551882234. The cubic root of 788090813 is about 923.6882553247.

The spelling of 788090813 in words is "seven hundred eighty-eight million, ninety thousand, eight hundred thirteen".