102321399 has 16 divisors (see below), whose sum is σ = 140659200. Its totient is φ = 66131136.

The previous prime is 102321379. The next prime is 102321409. The reversal of 102321399 is 993123201.

It is a happy number.

It is not a de Polignac number, because 102321399 - 2⁸ = 102321143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102321379) 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, 8962 + ... + 16880.

It is an arithmetic number, because the mean of its divisors is an integer number (8791200).

Almost surely, 2^102321399 is an apocalyptic number.

102321399 is a deficient number, since it is larger than the sum of its proper divisors (38337801).

102321399 is an equidigital number, since it uses as much as digits as its factorization.

102321399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 102321399 is about 10115.4040453162. The cubic root of 102321399 is about 467.7231039743.

It can be divided in two parts, 1023 and 21399, that added together give a palindrome (22422).

The spelling of 102321399 in words is "one hundred two million, three hundred twenty-one thousand, three hundred ninety-nine".