15663413 has 2 divisors, whose sum is σ = 15663414. Its totient is φ = 15663412.

The previous prime is 15663367. The next prime is 15663421. The reversal of 15663413 is 31436651.

It is a happy number.

15663413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8254129 + 7409284 = 2873^2 + 2722^2 .

It is an emirp because it is prime and its reverse (31436651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15663413 - 2⁸ = 15663157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15663433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7831706 + 7831707.

It is an arithmetic number, because the mean of its divisors is an integer number (7831707).

Almost surely, 2^15663413 is an apocalyptic number.

It is an amenable number.

15663413 is a deficient number, since it is larger than the sum of its proper divisors (1).

15663413 is an equidigital number, since it uses as much as digits as its factorization.

15663413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 29.

The square root of 15663413 is about 3957.7029954255. The cubic root of 15663413 is about 250.2047016765.

The spelling of 15663413 in words is "fifteen million, six hundred sixty-three thousand, four hundred thirteen".