102489623 has 4 divisors (see below), whose sum is σ = 103787040. Its totient is φ = 101192208.

The previous prime is 102489581. The next prime is 102489661. The reversal of 102489623 is 326984201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326984201 = 683 ⋅478747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102489623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102489523) 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, 648590 + ... + 648747.

It is an arithmetic number, because the mean of its divisors is an integer number (25946760).

Almost surely, 2^102489623 is an apocalyptic number.

102489623 is a deficient number, since it is larger than the sum of its proper divisors (1297417).

102489623 is an equidigital number, since it uses as much as digits as its factorization.

102489623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297416.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 102489623 is about 10123.7158691856. The cubic root of 102489623 is about 467.9792875023.

The spelling of 102489623 in words is "one hundred two million, four hundred eighty-nine thousand, six hundred twenty-three".