771813993 has 8 divisors (see below), whose sum is σ = 1032912000. Its totient is φ = 512629328.

The previous prime is 771813983. The next prime is 771814007. The reversal of 771813993 is 399318177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 771813993 - 2⁵ = 771813961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (771813983) 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 in 7 ways as a sum of consecutive naturals, for example, 477393 + ... + 479006.

It is an arithmetic number, because the mean of its divisors is an integer number (129114000).

Almost surely, 2^771813993 is an apocalyptic number.

It is an amenable number.

771813993 is a deficient number, since it is larger than the sum of its proper divisors (261098007).

771813993 is a wasteful number, since it uses less digits than its factorization.

771813993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956671.

The product of its digits is 285768, while the sum is 48.

The square root of 771813993 is about 27781.5405080424. The cubic root of 771813993 is about 917.2848401226.

The spelling of 771813993 in words is "seven hundred seventy-one million, eight hundred thirteen thousand, nine hundred ninety-three".