91664339 has 4 divisors (see below), whose sum is σ = 98715456. Its totient is φ = 84613224.

The previous prime is 91664327. The next prime is 91664351. The reversal of 91664339 is 93346619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93346619 = 109 ⋅856391.

It is an interprime number because it is at equal distance from previous prime (91664327) and next prime (91664351).

It is a cyclic number.

It is not a de Polignac number, because 91664339 - 2¹⁶ = 91598803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91664296 and 91664305.

It is not an unprimeable number, because it can be changed into a prime (91664369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3525539 + ... + 3525564.

It is an arithmetic number, because the mean of its divisors is an integer number (24678864).

Almost surely, 2^91664339 is an apocalyptic number.

91664339 is a deficient number, since it is larger than the sum of its proper divisors (7051117).

91664339 is a wasteful number, since it uses less digits than its factorization.

91664339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051116.

The product of its digits is 104976, while the sum is 41.

The square root of 91664339 is about 9574.1495183645. The cubic root of 91664339 is about 450.8860550257.

The spelling of 91664339 in words is "ninety-one million, six hundred sixty-four thousand, three hundred thirty-nine".