99964591 has 8 divisors (see below), whose sum is σ = 100660464. Its totient is φ = 99271680.

The previous prime is 99964589. The next prime is 99964597. The reversal of 99964591 is 19546999.

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 99964591 - 2¹ = 99964589 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99964597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155631 + ... + 156271.

It is an arithmetic number, because the mean of its divisors is an integer number (12582558).

Almost surely, 2^99964591 is an apocalyptic number.

99964591 is a deficient number, since it is larger than the sum of its proper divisors (695873).

99964591 is a wasteful number, since it uses less digits than its factorization.

99964591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481.

The product of its digits is 787320, while the sum is 52.

The square root of 99964591 is about 9998.2293932476. The cubic root of 99964591 is about 464.1040922208.

The spelling of 99964591 in words is "ninety-nine million, nine hundred sixty-four thousand, five hundred ninety-one".