102323621 has 4 divisors (see below), whose sum is σ = 102688044. Its totient is φ = 101959200.

The previous prime is 102323603. The next prime is 102323633. The reversal of 102323621 is 126323201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126323201 = 2003 ⋅63067.

It can be written as a sum of positive squares in 2 ways, for example, as 70795396 + 31528225 = 8414^2 + 5615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102323621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102323593 and 102323602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102323681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181790 + ... + 182351.

It is an arithmetic number, because the mean of its divisors is an integer number (25672011).

Almost surely, 2^102323621 is an apocalyptic number.

It is an amenable number.

102323621 is a deficient number, since it is larger than the sum of its proper divisors (364423).

102323621 is an equidigital number, since it uses as much as digits as its factorization.

102323621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364422.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 102323621 is about 10115.5138772086. The cubic root of 102323621 is about 467.7264896239.

Adding to 102323621 its reverse (126323201), we get a palindrome (228646822).

The spelling of 102323621 in words is "one hundred two million, three hundred twenty-three thousand, six hundred twenty-one".