16342409 has 2 divisors, whose sum is σ = 16342410. Its totient is φ = 16342408.

The previous prime is 16342393. The next prime is 16342421. The reversal of 16342409 is 90424361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8248384 + 8094025 = 2872^2 + 2845^2 .

It is a cyclic number.

It is not a de Polignac number, because 16342409 - 2⁴ = 16342393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16342499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8171204 + 8171205.

It is an arithmetic number, because the mean of its divisors is an integer number (8171205).

Almost surely, 2^16342409 is an apocalyptic number.

It is an amenable number.

16342409 is a deficient number, since it is larger than the sum of its proper divisors (1).

16342409 is an equidigital number, since it uses as much as digits as its factorization.

16342409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 16342409 is about 4042.5745509514. The cubic root of 16342409 is about 253.7690721507.

The spelling of 16342409 in words is "sixteen million, three hundred forty-two thousand, four hundred nine".