197631923 has 2 divisors, whose sum is σ = 197631924. Its totient is φ = 197631922.

The previous prime is 197631883. The next prime is 197631937. The reversal of 197631923 is 329136791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197631923 - 2⁸ = 197631667 is a prime.

It is not a weakly prime, because it can be changed into another prime (197631943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98815961 + 98815962.

It is an arithmetic number, because the mean of its divisors is an integer number (98815962).

Almost surely, 2^197631923 is an apocalyptic number.

197631923 is a deficient number, since it is larger than the sum of its proper divisors (1).

197631923 is an equidigital number, since it uses as much as digits as its factorization.

197631923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 41.

The square root of 197631923 is about 14058.1621487305. The cubic root of 197631923 is about 582.4862779283.

The spelling of 197631923 in words is "one hundred ninety-seven million, six hundred thirty-one thousand, nine hundred twenty-three".