28935913 has 2 divisors, whose sum is σ = 28935914. Its totient is φ = 28935912.

The previous prime is 28935889. The next prime is 28935919. The reversal of 28935913 is 31953982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 3564544 = 5037^2 + 1888^2 .

It is a cyclic number.

It is not a de Polignac number, because 28935913 - 2²¹ = 26838761 is a prime.

It is a super-2 number, since 2×28935913² = 1674574122287138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28935919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14467956 + 14467957.

It is an arithmetic number, because the mean of its divisors is an integer number (14467957).

Almost surely, 2^28935913 is an apocalyptic number.

It is an amenable number.

28935913 is a deficient number, since it is larger than the sum of its proper divisors (1).

28935913 is an equidigital number, since it uses as much as digits as its factorization.

28935913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 28935913 is about 5379.2111875255. The cubic root of 28935913 is about 307.0051989061.

The spelling of 28935913 in words is "twenty-eight million, nine hundred thirty-five thousand, nine hundred thirteen".