28697707 has 2 divisors, whose sum is σ = 28697708. Its totient is φ = 28697706.

The previous prime is 28697653. The next prime is 28697719. The reversal of 28697707 is 70779682.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28697707 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28697737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14348853 + 14348854.

It is an arithmetic number, because the mean of its divisors is an integer number (14348854).

Almost surely, 2^28697707 is an apocalyptic number.

28697707 is a deficient number, since it is larger than the sum of its proper divisors (1).

28697707 is an equidigital number, since it uses as much as digits as its factorization.

28697707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 28697707 is about 5357.0240805880. The cubic root of 28697707 is about 306.1604346164.

The spelling of 28697707 in words is "twenty-eight million, six hundred ninety-seven thousand, seven hundred seven".