772981 has 4 divisors (see below), whose sum is σ = 843264. Its totient is φ = 702700.

The previous prime is 772963. The next prime is 772987. The reversal of 772981 is 189277.

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: 189277 = 11 ⋅17207.

It is a cyclic number.

It is not a de Polignac number, because 772981 - 2⁵ = 772949 is a prime.

It is a super-2 number, since 2×772981² = 1194999252722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772987) 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 3 ways as a sum of consecutive naturals, for example, 35125 + ... + 35146.

It is an arithmetic number, because the mean of its divisors is an integer number (210816).

2⁷⁷²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

772981 is a deficient number, since it is larger than the sum of its proper divisors (70283).

772981 is a wasteful number, since it uses less digits than its factorization.

772981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70282.

The product of its digits is 7056, while the sum is 34.

The square root of 772981 is about 879.1933803208. The cubic root of 772981 is about 91.7746928467.

The spelling of 772981 in words is "seven hundred seventy-two thousand, nine hundred eighty-one".