102890123 has 4 divisors (see below), whose sum is σ = 117588720. Its totient is φ = 88191528.

The previous prime is 102890113. The next prime is 102890213. The reversal of 102890123 is 321098201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102890123 - 2²² = 98695819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102890092 and 102890101.

It is not an unprimeable number, because it can be changed into a prime (102890113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7349288 + ... + 7349301.

It is an arithmetic number, because the mean of its divisors is an integer number (29397180).

Almost surely, 2^102890123 is an apocalyptic number.

102890123 is a deficient number, since it is larger than the sum of its proper divisors (14698597).

102890123 is an equidigital number, since it uses as much as digits as its factorization.

102890123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14698596.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 102890123 is about 10143.4768693974. The cubic root of 102890123 is about 468.5880714049.

The spelling of 102890123 in words is "one hundred two million, eight hundred ninety thousand, one hundred twenty-three".