196909679 has 2 divisors, whose sum is σ = 196909680. Its totient is φ = 196909678.

The previous prime is 196909663. The next prime is 196909703. The reversal of 196909679 is 976909691.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196909679 - 2⁴ = 196909663 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196909579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98454839 + 98454840.

It is an arithmetic number, because the mean of its divisors is an integer number (98454840).

Almost surely, 2^196909679 is an apocalyptic number.

196909679 is a deficient number, since it is larger than the sum of its proper divisors (1).

196909679 is an equidigital number, since it uses as much as digits as its factorization.

196909679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1653372, while the sum is 56.

The square root of 196909679 is about 14032.4509263350. The cubic root of 196909679 is about 581.7758482671.

The spelling of 196909679 in words is "one hundred ninety-six million, nine hundred nine thousand, six hundred seventy-nine".