197431 has 4 divisors (see below), whose sum is σ = 212632. Its totient is φ = 182232.

The previous prime is 197423. The next prime is 197441. The reversal of 197431 is 134791.

197431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134791 = 37 ⋅3643.

It is a cyclic number.

It is not a de Polignac number, because 197431 - 2³ = 197423 is a prime.

It is a super-2 number, since 2×197431² = 77957999522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197396 and 197405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197441) 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, 7581 + ... + 7606.

It is an arithmetic number, because the mean of its divisors is an integer number (53158).

2¹⁹⁷⁴³¹ is an apocalyptic number.

197431 is a deficient number, since it is larger than the sum of its proper divisors (15201).

197431 is a wasteful number, since it uses less digits than its factorization.

197431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15200.

The product of its digits is 756, while the sum is 25.

The square root of 197431 is about 444.3320830190. The cubic root of 197431 is about 58.2288815608.

The spelling of 197431 in words is "one hundred ninety-seven thousand, four hundred thirty-one".