28984913 has 2 divisors, whose sum is σ = 28984914. Its totient is φ = 28984912.

The previous prime is 28984883. The next prime is 28984927. The reversal of 28984913 is 31948982.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26450449 + 2534464 = 5143^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 28984913 - 2⁶ = 28984849 is a prime.

It is not a weakly prime, because it can be changed into another prime (28984973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14492456 + 14492457.

It is an arithmetic number, because the mean of its divisors is an integer number (14492457).

Almost surely, 2^28984913 is an apocalyptic number.

It is an amenable number.

28984913 is a deficient number, since it is larger than the sum of its proper divisors (1).

28984913 is an equidigital number, since it uses as much as digits as its factorization.

28984913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 28984913 is about 5383.7638321160. The cubic root of 28984913 is about 307.1783951153.

The spelling of 28984913 in words is "twenty-eight million, nine hundred eighty-four thousand, nine hundred thirteen".