28472797 has 2 divisors, whose sum is σ = 28472798. Its totient is φ = 28472796.

The previous prime is 28472779. The next prime is 28472803. The reversal of 28472797 is 79727482.

Together with previous prime (28472779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27815076 + 657721 = 5274^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 28472797 - 2⁷ = 28472669 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28472707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14236398 + 14236399.

It is an arithmetic number, because the mean of its divisors is an integer number (14236399).

Almost surely, 2^28472797 is an apocalyptic number.

It is an amenable number.

28472797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28472797 is an equidigital number, since it uses as much as digits as its factorization.

28472797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 46.

The square root of 28472797 is about 5335.9907233802. The cubic root of 28472797 is about 305.3585213368.

The spelling of 28472797 in words is "twenty-eight million, four hundred seventy-two thousand, seven hundred ninety-seven".