28313797 has 2 divisors, whose sum is σ = 28313798. Its totient is φ = 28313796.

The previous prime is 28313771. The next prime is 28313801. The reversal of 28313797 is 79731382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17757796 + 10556001 = 4214^2 + 3249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28313797 is a prime.

It is a super-2 number, since 2×28313797² = 1603342201114418, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28313717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14156898 + 14156899.

It is an arithmetic number, because the mean of its divisors is an integer number (14156899).

Almost surely, 2^28313797 is an apocalyptic number.

It is an amenable number.

28313797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28313797 is an equidigital number, since it uses as much as digits as its factorization.

28313797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 28313797 is about 5321.0710388041. The cubic root of 28313797 is about 304.7890577621.

The spelling of 28313797 in words is "twenty-eight million, three hundred thirteen thousand, seven hundred ninety-seven".