28697803 has 2 divisors, whose sum is σ = 28697804. Its totient is φ = 28697802.

The previous prime is 28697797. The next prime is 28697821. The reversal of 28697803 is 30879682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28697803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28697803.

It is not a weakly prime, because it can be changed into another prime (28697863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348901 + 14348902.

It is an arithmetic number, because the mean of its divisors is an integer number (14348902).

Almost surely, 2^28697803 is an apocalyptic number.

28697803 is a deficient number, since it is larger than the sum of its proper divisors (1).

28697803 is an equidigital number, since it uses as much as digits as its factorization.

28697803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28697803 is about 5357.0330407792. The cubic root of 28697803 is about 306.1607760068.

It can be divided in two parts, 286 and 97803, that added together give a palindrome (98089).

The spelling of 28697803 in words is "twenty-eight million, six hundred ninety-seven thousand, eight hundred three".