196925917 has 2 divisors, whose sum is σ = 196925918. Its totient is φ = 196925916.

The previous prime is 196925879. The next prime is 196925933. The reversal of 196925917 is 719529691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196308121 + 617796 = 14011^2 + 786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196925917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196925947) 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, 98462958 + 98462959.

It is an arithmetic number, because the mean of its divisors is an integer number (98462959).

Almost surely, 2^196925917 is an apocalyptic number.

It is an amenable number.

196925917 is a deficient number, since it is larger than the sum of its proper divisors (1).

196925917 is an equidigital number, since it uses as much as digits as its factorization.

196925917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 49.

The square root of 196925917 is about 14033.0295018574. The cubic root of 196925917 is about 581.7918397216.

The spelling of 196925917 in words is "one hundred ninety-six million, nine hundred twenty-five thousand, nine hundred seventeen".