100999968197 has 2 divisors, whose sum is σ = 100999968198. Its totient is φ = 100999968196.

The previous prime is 100999968193. The next prime is 100999968211. The reversal of 100999968197 is 791869999001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90845576836 + 10154391361 = 301406^2 + 100769^2 .

It is a cyclic number.

It is not a de Polignac number, because 100999968197 - 2² = 100999968193 is a prime.

It is a super-2 number, since 2×100999968197² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100999968193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50499984098 + 50499984099.

It is an arithmetic number, because the mean of its divisors is an integer number (50499984099).

Almost surely, 2^100999968197 is an apocalyptic number.

It is an amenable number.

100999968197 is a deficient number, since it is larger than the sum of its proper divisors (1).

100999968197 is an equidigital number, since it uses as much as digits as its factorization.

100999968197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19840464, while the sum is 68.

The spelling of 100999968197 in words is "one hundred billion, nine hundred ninety-nine million, nine hundred sixty-eight thousand, one hundred ninety-seven".