102097999 has 2 divisors, whose sum is σ = 102098000. Its totient is φ = 102097998.

The previous prime is 102097993. The next prime is 102098057. The reversal of 102097999 is 999790201.

It is a weak prime.

It is an emirp because it is prime and its reverse (999790201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102097999 - 2³ = 102097991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102097991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51048999 + 51049000.

It is an arithmetic number, because the mean of its divisors is an integer number (51049000).

Almost surely, 2^102097999 is an apocalyptic number.

102097999 is a deficient number, since it is larger than the sum of its proper divisors (1).

102097999 is an equidigital number, since it uses as much as digits as its factorization.

102097999 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 46.

The square root of 102097999 is about 10104.3554470337. The cubic root of 102097999 is about 467.3824600840.

It can be divided in two parts, 102097 and 999, that multiplied together give a triangular number (101994903 = T₁₄₂₈₂).

The spelling of 102097999 in words is "one hundred two million, ninety-seven thousand, nine hundred ninety-nine".