91084649 has 8 divisors (see below), whose sum is σ = 92625288. Its totient is φ = 89556480.

The previous prime is 91084633. The next prime is 91084663. The reversal of 91084649 is 94648019.

It can be written as a sum of positive squares in 4 ways, for example, as 225625 + 90859024 = 475^2 + 9532^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91084649 - 2⁴ = 91084633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91084619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12239 + ... + 18219.

It is an arithmetic number, because the mean of its divisors is an integer number (11578161).

Almost surely, 2^91084649 is an apocalyptic number.

It is an amenable number.

91084649 is a deficient number, since it is larger than the sum of its proper divisors (1540639).

91084649 is a wasteful number, since it uses less digits than its factorization.

91084649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6235.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 91084649 is about 9543.8277960156. The cubic root of 91084649 is about 449.9335687944.

The spelling of 91084649 in words is "ninety-one million, eighty-four thousand, six hundred forty-nine".