102990 has 16 divisors (see below), whose sum is σ = 247248. Its totient is φ = 27456.

The previous prime is 102983. The next prime is 103001. The reversal of 102990 is 99201.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

102990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1687 + ... + 1746.

It is an arithmetic number, because the mean of its divisors is an integer number (15453).

2¹⁰²⁹⁹⁰ is an apocalyptic number.

102990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102990 is an abundant number, since it is smaller than the sum of its proper divisors (144258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102990 is a wasteful number, since it uses less digits than its factorization.

102990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3443.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 102990 is about 320.9205509156. The cubic root of 102990 is about 46.8739644216.

The spelling of 102990 in words is "one hundred two thousand, nine hundred ninety".