431102197 has 4 divisors (see below), whose sum is σ = 445967820. Its totient is φ = 416236576.

The previous prime is 431102129. The next prime is 431102209. The reversal of 431102197 is 791201134.

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 200335716 + 230766481 = 14154^2 + 15191^2 .

It is a cyclic number.

It is not a de Polignac number, because 431102197 - 2²³ = 422713589 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 (431102117) 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, 7432768 + ... + 7432825.

It is an arithmetic number, because the mean of its divisors is an integer number (111491955).

Almost surely, 2^431102197 is an apocalyptic number.

It is an amenable number.

431102197 is a deficient number, since it is larger than the sum of its proper divisors (14865623).

431102197 is a wasteful number, since it uses less digits than its factorization.

431102197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14865622.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 431102197 is about 20763.0006742763. Note that the first 3 decimals coincide. The cubic root of 431102197 is about 755.4285811336.

Subtracting from 431102197 its sum of digits (28), we obtain a square (431102169 = 20763²).

The spelling of 431102197 in words is "four hundred thirty-one million, one hundred two thousand, one hundred ninety-seven".