28697743 has 2 divisors, whose sum is σ = 28697744. Its totient is φ = 28697742.

The previous prime is 28697737. The next prime is 28697761. The reversal of 28697743 is 34779682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28697743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28697693 and 28697702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28697143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348871 + 14348872.

It is an arithmetic number, because the mean of its divisors is an integer number (14348872).

Almost surely, 2^28697743 is an apocalyptic number.

28697743 is a deficient number, since it is larger than the sum of its proper divisors (1).

28697743 is an equidigital number, since it uses as much as digits as its factorization.

28697743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 46.

The square root of 28697743 is about 5357.0274406615. The cubic root of 28697743 is about 306.1605626379.

The spelling of 28697743 in words is "twenty-eight million, six hundred ninety-seven thousand, seven hundred forty-three".