28199713 has 2 divisors, whose sum is σ = 28199714. Its totient is φ = 28199712.

The previous prime is 28199711. The next prime is 28199723. The reversal of 28199713 is 31799182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26501904 + 1697809 = 5148^2 + 1303^2 .

It is a cyclic number.

It is not a de Polignac number, because 28199713 - 2¹ = 28199711 is a prime.

Together with 28199711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28199711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14099856 + 14099857.

It is an arithmetic number, because the mean of its divisors is an integer number (14099857).

Almost surely, 2^28199713 is an apocalyptic number.

It is an amenable number.

28199713 is a deficient number, since it is larger than the sum of its proper divisors (1).

28199713 is an equidigital number, since it uses as much as digits as its factorization.

28199713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 40.

The square root of 28199713 is about 5310.3401962586. The cubic root of 28199713 is about 304.3791473447.

The spelling of 28199713 in words is "twenty-eight million, one hundred ninety-nine thousand, seven hundred thirteen".