16253609 has 4 divisors (see below), whose sum is σ = 16351104. Its totient is φ = 16156116.

The previous prime is 16253603. The next prime is 16253647. The reversal of 16253609 is 90635261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90635261 = 211 ⋅429551.

It is a cyclic number.

It is not a de Polignac number, because 16253609 - 2⁴ = 16253593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16253603) 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, 48497 + ... + 48830.

It is an arithmetic number, because the mean of its divisors is an integer number (4087776).

Almost surely, 2^16253609 is an apocalyptic number.

It is an amenable number.

16253609 is a deficient number, since it is larger than the sum of its proper divisors (97495).

16253609 is an equidigital number, since it uses as much as digits as its factorization.

16253609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97494.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 16253609 is about 4031.5764906547. The cubic root of 16253609 is about 253.3086008096.

The spelling of 16253609 in words is "sixteen million, two hundred fifty-three thousand, six hundred nine".