28075961 has 2 divisors, whose sum is σ = 28075962. Its totient is φ = 28075960.

The previous prime is 28075937. The next prime is 28075963. The reversal of 28075961 is 16957082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27762361 + 313600 = 5269^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28075961 is a prime.

It is a Sophie Germain prime.

Together with 28075963, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28075963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14037980 + 14037981.

It is an arithmetic number, because the mean of its divisors is an integer number (14037981).

Almost surely, 2^28075961 is an apocalyptic number.

It is an amenable number.

28075961 is a deficient number, since it is larger than the sum of its proper divisors (1).

28075961 is an equidigital number, since it uses as much as digits as its factorization.

28075961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28075961 is about 5298.6754005128. The cubic root of 28075961 is about 303.9332472605.

The spelling of 28075961 in words is "twenty-eight million, seventy-five thousand, nine hundred sixty-one".