102273989 has 12 divisors (see below), whose sum is σ = 109442124. Its totient is φ = 95243904.

The previous prime is 102273947. The next prime is 102274001. The reversal of 102273989 is 989372201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68145025 + 34128964 = 8255^2 + 5842^2 .

It is not a de Polignac number, because 102273989 - 2⁸ = 102273733 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102273889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274007 + ... + 274379.

It is an arithmetic number, because the mean of its divisors is an integer number (9120177).

Almost surely, 2^102273989 is an apocalyptic number.

It is an amenable number.

102273989 is a deficient number, since it is larger than the sum of its proper divisors (7168135).

102273989 is an equidigital number, since it uses as much as digits as its factorization.

102273989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 102273989 is about 10113.0603182222. The cubic root of 102273989 is about 467.6508539259.

The spelling of 102273989 in words is "one hundred two million, two hundred seventy-three thousand, nine hundred eighty-nine".