28694791 has 2 divisors, whose sum is σ = 28694792. Its totient is φ = 28694790.

The previous prime is 28694789. The next prime is 28694801. The reversal of 28694791 is 19749682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28694791 - 2¹ = 28694789 is a prime.

Together with 28694789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28694191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14347395 + 14347396.

It is an arithmetic number, because the mean of its divisors is an integer number (14347396).

Almost surely, 2^28694791 is an apocalyptic number.

28694791 is a deficient number, since it is larger than the sum of its proper divisors (1).

28694791 is an equidigital number, since it uses as much as digits as its factorization.

28694791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 28694791 is about 5356.7519076396. The cubic root of 28694791 is about 306.1500645188.

The spelling of 28694791 in words is "twenty-eight million, six hundred ninety-four thousand, seven hundred ninety-one".