460921981 has 24 divisors (see below), whose sum is σ = 521090304. Its totient is φ = 407047680.

The previous prime is 460921961. The next prime is 460922023. The reversal of 460921981 is 189129064.

It is a de Polignac number, because none of the positive numbers 2^k-460921981 is a prime.

It is a super-2 number, since 2×460921981² = 424898145137928722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (460921921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 507730 + ... + 508636.

It is an arithmetic number, because the mean of its divisors is an integer number (21712096).

Almost surely, 2^460921981 is an apocalyptic number.

It is an amenable number.

460921981 is a deficient number, since it is larger than the sum of its proper divisors (60168323).

460921981 is a wasteful number, since it uses less digits than its factorization.

460921981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 460921981 is about 21469.0936231598. The cubic root of 460921981 is about 772.4596563941.

The spelling of 460921981 in words is "four hundred sixty million, nine hundred twenty-one thousand, nine hundred eighty-one".