91050287 has 2 divisors, whose sum is σ = 91050288. Its totient is φ = 91050286.

The previous prime is 91050263. The next prime is 91050341. The reversal of 91050287 is 78205019.

It is a weak prime.

It is an emirp because it is prime and its reverse (78205019) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91050287 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91050587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45525143 + 45525144.

It is an arithmetic number, because the mean of its divisors is an integer number (45525144).

Almost surely, 2^91050287 is an apocalyptic number.

91050287 is a deficient number, since it is larger than the sum of its proper divisors (1).

91050287 is an equidigital number, since it uses as much as digits as its factorization.

91050287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 91050287 is about 9542.0274051168. The cubic root of 91050287 is about 449.8769820111.

The spelling of 91050287 in words is "ninety-one million, fifty thousand, two hundred eighty-seven".