16419709 has 2 divisors, whose sum is σ = 16419710. Its totient is φ = 16419708.

The previous prime is 16419701. The next prime is 16419719. The reversal of 16419709 is 90791461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 459684 = 3995^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 16419709 - 2³ = 16419701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16419701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8209854 + 8209855.

It is an arithmetic number, because the mean of its divisors is an integer number (8209855).

Almost surely, 2^16419709 is an apocalyptic number.

It is an amenable number.

16419709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16419709 is an equidigital number, since it uses as much as digits as its factorization.

16419709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 16419709 is about 4052.1240109355. The cubic root of 16419709 is about 254.1685542934.

The spelling of 16419709 in words is "sixteen million, four hundred nineteen thousand, seven hundred nine".