197631793 has 2 divisors, whose sum is σ = 197631794. Its totient is φ = 197631792.

The previous prime is 197631751. The next prime is 197631799. The reversal of 197631793 is 397136791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143712144 + 53919649 = 11988^2 + 7343^2 .

It is a cyclic number.

It is not a de Polignac number, because 197631793 - 2⁹ = 197631281 is a prime.

It is not a weakly prime, because it can be changed into another prime (197631799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98815896 + 98815897.

It is an arithmetic number, because the mean of its divisors is an integer number (98815897).

Almost surely, 2^197631793 is an apocalyptic number.

It is an amenable number.

197631793 is a deficient number, since it is larger than the sum of its proper divisors (1).

197631793 is an equidigital number, since it uses as much as digits as its factorization.

197631793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 214326, while the sum is 46.

The square root of 197631793 is about 14058.1575250813. The cubic root of 197631793 is about 582.4861502107.

The spelling of 197631793 in words is "one hundred ninety-seven million, six hundred thirty-one thousand, seven hundred ninety-three".