16475609 has 2 divisors, whose sum is σ = 16475610. Its totient is φ = 16475608.

The previous prime is 16475597. The next prime is 16475611. The reversal of 16475609 is 90657461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 635209 = 3980^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 16475609 - 2¹² = 16471513 is a prime.

Together with 16475611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16475639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8237804 + 8237805.

It is an arithmetic number, because the mean of its divisors is an integer number (8237805).

Almost surely, 2^16475609 is an apocalyptic number.

It is an amenable number.

16475609 is a deficient number, since it is larger than the sum of its proper divisors (1).

16475609 is an equidigital number, since it uses as much as digits as its factorization.

16475609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 16475609 is about 4059.0157673998. The cubic root of 16475609 is about 254.4566618990.

The spelling of 16475609 in words is "sixteen million, four hundred seventy-five thousand, six hundred nine".