16406393 has 2 divisors, whose sum is σ = 16406394. Its totient is φ = 16406392.

The previous prime is 16406389. The next prime is 16406407. The reversal of 16406393 is 39360461.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 310249 = 4012^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 16406393 - 2² = 16406389 is a prime.

It is not a weakly prime, because it can be changed into another prime (16406323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8203196 + 8203197.

It is an arithmetic number, because the mean of its divisors is an integer number (8203197).

Almost surely, 2^16406393 is an apocalyptic number.

It is an amenable number.

16406393 is a deficient number, since it is larger than the sum of its proper divisors (1).

16406393 is an equidigital number, since it uses as much as digits as its factorization.

16406393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 16406393 is about 4050.4805887697. The cubic root of 16406393 is about 254.0998274603.

The spelling of 16406393 in words is "sixteen million, four hundred six thousand, three hundred ninety-three".