763981 has 8 divisors (see below), whose sum is σ = 793760. Its totient is φ = 734832.

The previous prime is 763967. The next prime is 763999. The reversal of 763981 is 189367.

763981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a 8-Lehmer number, since φ(763981) divides (763981-1)⁸.

It is a cyclic number.

It is not a de Polignac number, because 763981 - 2¹³ = 755789 is a prime.

It is a super-2 number, since 2×763981² = 1167333936722, which contains 22 as substring.

It is a Duffinian number.

763981 is a modest number, since divided by 981 gives 763 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (763901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4606 + ... + 4768.

It is an arithmetic number, because the mean of its divisors is an integer number (99220).

2⁷⁶³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

763981 is a deficient number, since it is larger than the sum of its proper divisors (29779).

763981 is a wasteful number, since it uses less digits than its factorization.

763981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315.

The product of its digits is 9072, while the sum is 34.

The square root of 763981 is about 874.0600665858. The cubic root of 763981 is about 91.4171166592.

The spelling of 763981 in words is "seven hundred sixty-three thousand, nine hundred eighty-one".