790681891 has 2 divisors, whose sum is σ = 790681892. Its totient is φ = 790681890.

The previous prime is 790681873. The next prime is 790681921. The reversal of 790681891 is 198186097.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 790681891 - 2¹⁷ = 790550819 is a prime.

It is not a weakly prime, because it can be changed into another prime (790681861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395340945 + 395340946.

It is an arithmetic number, because the mean of its divisors is an integer number (395340946).

Almost surely, 2^790681891 is an apocalyptic number.

790681891 is a deficient number, since it is larger than the sum of its proper divisors (1).

790681891 is an equidigital number, since it uses as much as digits as its factorization.

790681891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 790681891 is about 28119.0663251823. The cubic root of 790681891 is about 924.6994459620.

The spelling of 790681891 in words is "seven hundred ninety million, six hundred eighty-one thousand, eight hundred ninety-one".