431020997 has 12 divisors (see below), whose sum is σ = 490107660. Its totient is φ = 378322560.

The previous prime is 431020979. The next prime is 431020999. The reversal of 431020997 is 799020134.

It can be written as a sum of positive squares in 2 ways, for example, as 298632961 + 132388036 = 17281^2 + 11506^2 .

It is a de Polignac number, because none of the positive numbers 2^k-431020997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431020999) 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, 57908 + ... + 64925.

It is an arithmetic number, because the mean of its divisors is an integer number (40842305).

Almost surely, 2^431020997 is an apocalyptic number.

It is an amenable number.

431020997 is a deficient number, since it is larger than the sum of its proper divisors (59086663).

431020997 is a wasteful number, since it uses less digits than its factorization.

431020997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122884 (or 122873 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 431020997 is about 20761.0451808188. The cubic root of 431020997 is about 755.3811487205.

The spelling of 431020997 in words is "four hundred thirty-one million, twenty thousand, nine hundred ninety-seven".