196438631 has 2 divisors, whose sum is σ = 196438632. Its totient is φ = 196438630.

The previous prime is 196438591. The next prime is 196438639. The reversal of 196438631 is 136834691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196438631 is a prime.

It is a super-2 number, since 2×196438631² = 77176271498308322, 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 (196438639) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98219315 + 98219316.

It is an arithmetic number, because the mean of its divisors is an integer number (98219316).

Almost surely, 2^196438631 is an apocalyptic number.

196438631 is a deficient number, since it is larger than the sum of its proper divisors (1).

196438631 is an equidigital number, since it uses as much as digits as its factorization.

196438631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 196438631 is about 14015.6566382029. The cubic root of 196438631 is about 581.3115691361.

The spelling of 196438631 in words is "one hundred ninety-six million, four hundred thirty-eight thousand, six hundred thirty-one".