775997 has 4 divisors (see below), whose sum is σ = 809760. Its totient is φ = 742236.

The previous prime is 775987. The next prime is 776003. The reversal of 775997 is 799577.

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, and also an emirpimes, since its reverse is a distinct semiprime: 799577 = 19 ⋅42083.

It is a cyclic number.

It is not a de Polignac number, because 775997 - 2⁶ = 775933 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 (775937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16847 + ... + 16892.

It is an arithmetic number, because the mean of its divisors is an integer number (202440).

2⁷⁷⁵⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

775997 is a deficient number, since it is larger than the sum of its proper divisors (33763).

775997 is a wasteful number, since it uses less digits than its factorization.

775997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33762.

The product of its digits is 138915, while the sum is 44.

The square root of 775997 is about 880.9069190329. The cubic root of 775997 is about 91.8938994239.

The spelling of 775997 in words is "seven hundred seventy-five thousand, nine hundred ninety-seven".