16431617 has 2 divisors, whose sum is σ = 16431618. Its totient is φ = 16431616.

The previous prime is 16431587. The next prime is 16431659. The reversal of 16431617 is 71613461.

16431617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11587216 + 4844401 = 3404^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 16431617 - 2⁶ = 16431553 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16431617.

It is not a weakly prime, because it can be changed into another prime (16431697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8215808 + 8215809.

It is an arithmetic number, because the mean of its divisors is an integer number (8215809).

Almost surely, 2^16431617 is an apocalyptic number.

It is an amenable number.

16431617 is a deficient number, since it is larger than the sum of its proper divisors (1).

16431617 is an equidigital number, since it uses as much as digits as its factorization.

16431617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 29.

The square root of 16431617 is about 4053.5930974877. The cubic root of 16431617 is about 254.2299826612.

The spelling of 16431617 in words is "sixteen million, four hundred thirty-one thousand, six hundred seventeen".