774991 has 8 divisors (see below), whose sum is σ = 932480. Its totient is φ = 629208.

The previous prime is 774959. The next prime is 774997. The reversal of 774991 is 199477.

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 774991 - 2⁵ = 774959 is a prime.

It is a super-2 number, since 2×774991² = 1201222100162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 774991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774997) 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, 2781 + ... + 3046.

It is an arithmetic number, because the mean of its divisors is an integer number (116560).

2⁷⁷⁴⁹⁹¹ is an apocalyptic number.

774991 is a deficient number, since it is larger than the sum of its proper divisors (157489).

774991 is a wasteful number, since it uses less digits than its factorization.

774991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853.

The product of its digits is 15876, while the sum is 37.

The square root of 774991 is about 880.3357314116. The cubic root of 774991 is about 91.8541719334.

The spelling of 774991 in words is "seven hundred seventy-four thousand, nine hundred ninety-one".