102622409 has 4 divisors (see below), whose sum is σ = 103311300. Its totient is φ = 101933520.

The previous prime is 102622361. The next prime is 102622427. The reversal of 102622409 is 904226201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904226201 = 977 ⋅925513.

It can be written as a sum of positive squares in 2 ways, for example, as 5895184 + 96727225 = 2428^2 + 9835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102622409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102622109) 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, 344222 + ... + 344519.

It is an arithmetic number, because the mean of its divisors is an integer number (25827825).

Almost surely, 2^102622409 is an apocalyptic number.

It is an amenable number.

102622409 is a deficient number, since it is larger than the sum of its proper divisors (688891).

102622409 is an equidigital number, since it uses as much as digits as its factorization.

102622409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688890.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 102622409 is about 10130.2719114543. The cubic root of 102622409 is about 468.1813056136.

The spelling of 102622409 in words is "one hundred two million, six hundred twenty-two thousand, four hundred nine".