979198101691 has 2 divisors, whose sum is σ = 979198101692. Its totient is φ = 979198101690.

The previous prime is 979198101517. The next prime is 979198101701. The reversal of 979198101691 is 196101891979.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 979198101691 - 2⁹ = 979198101179 is a prime.

It is not a weakly prime, because it can be changed into another prime (979198101991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489599050845 + 489599050846.

It is an arithmetic number, because the mean of its divisors is an integer number (489599050846).

Almost surely, 2^979198101691 is an apocalyptic number.

979198101691 is a deficient number, since it is larger than the sum of its proper divisors (1).

979198101691 is an equidigital number, since it uses as much as digits as its factorization.

979198101691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 61.

The spelling of 979198101691 in words is "nine hundred seventy-nine billion, one hundred ninety-eight million, one hundred one thousand, six hundred ninety-one".