28134493 has 2 divisors, whose sum is σ = 28134494. Its totient is φ = 28134492.

The previous prime is 28134479. The next prime is 28134503. The reversal of 28134493 is 39443182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 11471769 = 4082^2 + 3387^2 .

It is a cyclic number.

It is not a de Polignac number, because 28134493 - 2⁵ = 28134461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28134433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14067246 + 14067247.

It is an arithmetic number, because the mean of its divisors is an integer number (14067247).

Almost surely, 2^28134493 is an apocalyptic number.

It is an amenable number.

28134493 is a deficient number, since it is larger than the sum of its proper divisors (1).

28134493 is an equidigital number, since it uses as much as digits as its factorization.

28134493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 28134493 is about 5304.1957920122. The cubic root of 28134493 is about 304.1443112445.

The spelling of 28134493 in words is "twenty-eight million, one hundred thirty-four thousand, four hundred ninety-three".