999964197 has 32 divisors (see below), whose sum is σ = 1528191360. Its totient is φ = 653988816.

The previous prime is 999964187. The next prime is 999964247. The reversal of 999964197 is 791469999.

It is not a de Polignac number, because 999964197 - 2⁸ = 999963941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999964187) 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 31 ways as a sum of consecutive naturals, for example, 111598 + ... + 120224.

It is an arithmetic number, because the mean of its divisors is an integer number (47755980).

Almost surely, 2^999964197 is an apocalyptic number.

It is an amenable number.

999964197 is a deficient number, since it is larger than the sum of its proper divisors (528227163).

999964197 is an frugal number, since it uses more digits than its factorization.

999964197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8701 (or 8683 counting only the distinct ones).

The product of its digits is 9920232, while the sum is 63.

The square root of 999964197 is about 31622.2105014814. The cubic root of 999964197 is about 999.9880655242.

The spelling of 999964197 in words is "nine hundred ninety-nine million, nine hundred sixty-four thousand, one hundred ninety-seven".