790991789 has 4 divisors (see below), whose sum is σ = 903990624. Its totient is φ = 677992956.

The previous prime is 790991777. The next prime is 790991863. The reversal of 790991789 is 987199097.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 790991789 - 2⁸ = 790991533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790991989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56499407 + ... + 56499420.

It is an arithmetic number, because the mean of its divisors is an integer number (225997656).

Almost surely, 2^790991789 is an apocalyptic number.

It is an amenable number.

790991789 is a deficient number, since it is larger than the sum of its proper divisors (112998835).

790991789 is a wasteful number, since it uses less digits than its factorization.

790991789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112998834.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 790991789 is about 28124.5762456966. The cubic root of 790991789 is about 924.8202383574.

The spelling of 790991789 in words is "seven hundred ninety million, nine hundred ninety-one thousand, seven hundred eighty-nine".