764981 has 8 divisors (see below), whose sum is σ = 883584. Its totient is φ = 648720.

The previous prime is 764977. The next prime is 764989. The reversal of 764981 is 189467.

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 764981 - 2² = 764977 is a prime.

It is a super-2 number, since 2×764981² = 1170391860722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (110448).

2⁷⁶⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

764981 is a deficient number, since it is larger than the sum of its proper divisors (118603).

764981 is a wasteful number, since it uses less digits than its factorization.

764981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its digits is 12096, while the sum is 35.

The square root of 764981 is about 874.6319225823. The cubic root of 764981 is about 91.4569855649.

The spelling of 764981 in words is "seven hundred sixty-four thousand, nine hundred eighty-one".