22429409 has 4 divisors (see below), whose sum is σ = 23748804. Its totient is φ = 21110016.

The previous prime is 22429403. The next prime is 22429493. The reversal of 22429409 is 90492422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90492422 = 2 ⋅45246211.

It can be written as a sum of positive squares in 2 ways, for example, as 13667809 + 8761600 = 3697^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 22429409 - 2¹² = 22425313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22429403) 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, 659672 + ... + 659705.

It is an arithmetic number, because the mean of its divisors is an integer number (5937201).

Almost surely, 2^22429409 is an apocalyptic number.

It is an amenable number.

22429409 is a deficient number, since it is larger than the sum of its proper divisors (1319395).

22429409 is a wasteful number, since it uses less digits than its factorization.

22429409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319394.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 22429409 is about 4735.9697000720. The cubic root of 22429409 is about 282.0152608142.

The spelling of 22429409 in words is "twenty-two million, four hundred twenty-nine thousand, four hundred nine".