102423209 has 16 divisors (see below), whose sum is σ = 124158720. Its totient is φ = 82589760.

The previous prime is 102423203. The next prime is 102423241. The reversal of 102423209 is 902324201.

It is a cyclic number.

It is not a de Polignac number, because 102423209 - 2¹² = 102419113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (102423203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4607 + ... + 15035.

It is an arithmetic number, because the mean of its divisors is an integer number (7759920).

Almost surely, 2^102423209 is an apocalyptic number.

It is an amenable number.

102423209 is a deficient number, since it is larger than the sum of its proper divisors (21735511).

102423209 is a wasteful number, since it uses less digits than its factorization.

102423209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10520.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 102423209 is about 10120.4352179143. The cubic root of 102423209 is about 467.8781810314.

The spelling of 102423209 in words is "one hundred two million, four hundred twenty-three thousand, two hundred nine".