431549397 has 16 divisors (see below), whose sum is σ = 640912000. Its totient is φ = 286988832.

The previous prime is 431549359. The next prime is 431549399. The reversal of 431549397 is 793945134.

It is not a de Polignac number, because 431549397 - 2⁸ = 431549141 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 (431549399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8497 + ... + 30582.

It is an arithmetic number, because the mean of its divisors is an integer number (40057000).

Almost surely, 2^431549397 is an apocalyptic number.

It is an amenable number.

431549397 is a deficient number, since it is larger than the sum of its proper divisors (209362603).

431549397 is a wasteful number, since it uses less digits than its factorization.

431549397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39497 (or 39491 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 431549397 is about 20773.7670392252. The cubic root of 431549397 is about 755.6897032194.

The spelling of 431549397 in words is "four hundred thirty-one million, five hundred forty-nine thousand, three hundred ninety-seven".