431491982 has 4 divisors (see below), whose sum is σ = 647237976. Its totient is φ = 215745990.

The previous prime is 431491981. The next prime is 431491997. The reversal of 431491982 is 289194134.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431491981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107872994 + ... + 107872997.

It is an arithmetic number, because the mean of its divisors is an integer number (161809494).

Almost surely, 2^431491982 is an apocalyptic number.

431491982 is a deficient number, since it is larger than the sum of its proper divisors (215745994).

431491982 is a wasteful number, since it uses less digits than its factorization.

431491982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215745993.

The product of its digits is 62208, while the sum is 41.

The square root of 431491982 is about 20772.3850821229. The cubic root of 431491982 is about 755.6561884399.

The spelling of 431491982 in words is "four hundred thirty-one million, four hundred ninety-one thousand, nine hundred eighty-two".