431570197 has 4 divisors (see below), whose sum is σ = 433106316. Its totient is φ = 430034080.

The previous prime is 431570179. The next prime is 431570207. The reversal of 431570197 is 791075134.

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

It can be written as a sum of positive squares in 2 ways, for example, as 350101521 + 81468676 = 18711^2 + 9026^2 .

It is a cyclic number.

It is not a de Polignac number, because 431570197 - 2²⁷ = 297352469 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 (431570897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767638 + ... + 768199.

It is an arithmetic number, because the mean of its divisors is an integer number (108276579).

Almost surely, 2^431570197 is an apocalyptic number.

It is an amenable number.

431570197 is a deficient number, since it is larger than the sum of its proper divisors (1536119).

431570197 is a wasteful number, since it uses less digits than its factorization.

431570197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536118.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 431570197 is about 20774.2676645893. The cubic root of 431570197 is about 755.7018440414.

The spelling of 431570197 in words is "four hundred thirty-one million, five hundred seventy thousand, one hundred ninety-seven".