431730981 has 12 divisors (see below), whose sum is σ = 680303520. Its totient is φ = 261655080.

The previous prime is 431730973. The next prime is 431730991. The reversal of 431730981 is 189037134.

It is a happy number.

It is not a de Polignac number, because 431730981 - 2³ = 431730973 is a prime.

It is a super-2 number, since 2×431730981² = 372783279910444722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431730931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2180361 + ... + 2180558.

It is an arithmetic number, because the mean of its divisors is an integer number (56691960).

Almost surely, 2^431730981 is an apocalyptic number.

It is an amenable number.

431730981 is a deficient number, since it is larger than the sum of its proper divisors (248572539).

431730981 is a wasteful number, since it uses less digits than its factorization.

431730981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360936 (or 4360933 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 431730981 is about 20778.1370916644. The cubic root of 431730981 is about 755.7956794361.

The spelling of 431730981 in words is "four hundred thirty-one million, seven hundred thirty thousand, nine hundred eighty-one".