28943701 has 2 divisors, whose sum is σ = 28943702. Its totient is φ = 28943700.

The previous prime is 28943699. The next prime is 28943749. The reversal of 28943701 is 10734982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24108100 + 4835601 = 4910^2 + 2199^2 .

It is a cyclic number.

It is not a de Polignac number, because 28943701 - 2¹ = 28943699 is a prime.

Together with 28943699, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28943501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14471850 + 14471851.

It is an arithmetic number, because the mean of its divisors is an integer number (14471851).

Almost surely, 2^28943701 is an apocalyptic number.

It is an amenable number.

28943701 is a deficient number, since it is larger than the sum of its proper divisors (1).

28943701 is an equidigital number, since it uses as much as digits as its factorization.

28943701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28943701 is about 5379.9350367825. The cubic root of 28943701 is about 307.0327395614.

The spelling of 28943701 in words is "twenty-eight million, nine hundred forty-three thousand, seven hundred one".