15428813 has 2 divisors, whose sum is σ = 15428814. Its totient is φ = 15428812.

The previous prime is 15428767. The next prime is 15428839. The reversal of 15428813 is 31882451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13823524 + 1605289 = 3718^2 + 1267^2 .

It is an emirp because it is prime and its reverse (31882451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15428813 - 2⁸ = 15428557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15428813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15428213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7714406 + 7714407.

It is an arithmetic number, because the mean of its divisors is an integer number (7714407).

Almost surely, 2^15428813 is an apocalyptic number.

It is an amenable number.

15428813 is a deficient number, since it is larger than the sum of its proper divisors (1).

15428813 is an equidigital number, since it uses as much as digits as its factorization.

15428813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 32.

The square root of 15428813 is about 3927.9527746652. The cubic root of 15428813 is about 248.9492592963.

The spelling of 15428813 in words is "fifteen million, four hundred twenty-eight thousand, eight hundred thirteen".