102681999 has 60 divisors (see below), whose sum is σ = 183073968. Its totient is φ = 57153600.

The previous prime is 102681991. The next prime is 102682003. The reversal of 102681999 is 999186201.

It is not a de Polignac number, because 102681999 - 2³ = 102681991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102681991) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 162414 + ... + 163044.

Almost surely, 2^102681999 is an apocalyptic number.

102681999 is a deficient number, since it is larger than the sum of its proper divisors (80391969).

102681999 is an equidigital number, since it uses as much as digits as its factorization.

102681999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 102681999 is about 10133.2126692377. The cubic root of 102681999 is about 468.2719080657.

The spelling of 102681999 in words is "one hundred two million, six hundred eighty-one thousand, nine hundred ninety-nine".