197853431 has 2 divisors, whose sum is σ = 197853432. Its totient is φ = 197853430.

The previous prime is 197853391. The next prime is 197853493. The reversal of 197853431 is 134358791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197853431 - 2¹⁸ = 197591287 is a prime.

It is a super-2 number, since 2×197853431² = 78291960316943522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197853031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98926715 + 98926716.

It is an arithmetic number, because the mean of its divisors is an integer number (98926716).

Almost surely, 2^197853431 is an apocalyptic number.

197853431 is a deficient number, since it is larger than the sum of its proper divisors (1).

197853431 is an equidigital number, since it uses as much as digits as its factorization.

197853431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 197853431 is about 14066.0382126596. The cubic root of 197853431 is about 582.7038156522.

The spelling of 197853431 in words is "one hundred ninety-seven million, eight hundred fifty-three thousand, four hundred thirty-one".