91016539 has 2 divisors, whose sum is σ = 91016540. Its totient is φ = 91016538.

The previous prime is 91016537. The next prime is 91016551. The reversal of 91016539 is 93561019.

It is a weak prime.

It is an emirp because it is prime and its reverse (93561019) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91016539 - 2¹ = 91016537 is a prime.

Together with 91016537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (91016531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45508269 + 45508270.

It is an arithmetic number, because the mean of its divisors is an integer number (45508270).

Almost surely, 2^91016539 is an apocalyptic number.

91016539 is a deficient number, since it is larger than the sum of its proper divisors (1).

91016539 is an equidigital number, since it uses as much as digits as its factorization.

91016539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 91016539 is about 9540.2588539305. The cubic root of 91016539 is about 449.8213924936.

The spelling of 91016539 in words is "ninety-one million, sixteen thousand, five hundred thirty-nine".