197864231 has 2 divisors, whose sum is σ = 197864232. Its totient is φ = 197864230.

The previous prime is 197864221. The next prime is 197864257. The reversal of 197864231 is 132468791.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197864231 is a prime.

It is a super-2 number, since 2×197864231² = 78300507818442722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197864201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98932115 + 98932116.

It is an arithmetic number, because the mean of its divisors is an integer number (98932116).

Almost surely, 2^197864231 is an apocalyptic number.

197864231 is a deficient number, since it is larger than the sum of its proper divisors (1).

197864231 is an equidigital number, since it uses as much as digits as its factorization.

197864231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 197864231 is about 14066.4221108283. The cubic root of 197864231 is about 582.7144179226.

The spelling of 197864231 in words is "one hundred ninety-seven million, eight hundred sixty-four thousand, two hundred thirty-one".