102199997 has 2 divisors, whose sum is σ = 102199998. Its totient is φ = 102199996.

The previous prime is 102199987. The next prime is 102200011. The reversal of 102199997 is 799991201.

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., 100420441 + 1779556 = 10021^2 + 1334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102199997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102199907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51099998 + 51099999.

It is an arithmetic number, because the mean of its divisors is an integer number (51099999).

Almost surely, 2^102199997 is an apocalyptic number.

It is an amenable number.

102199997 is a deficient number, since it is larger than the sum of its proper divisors (1).

102199997 is an equidigital number, since it uses as much as digits as its factorization.

102199997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 47.

The square root of 102199997 is about 10109.4014165034. The cubic root of 102199997 is about 467.5380498452.

The spelling of 102199997 in words is "one hundred two million, one hundred ninety-nine thousand, nine hundred ninety-seven".