199686964 has 12 divisors (see below), whose sum is σ = 370008324. Its totient is φ = 93970304.

The previous prime is 199686937. The next prime is 199687009. The reversal of 199686964 is 469686991.

It can be written as a sum of positive squares in 2 ways, for example, as 142563600 + 57123364 = 11940^2 + 7558^2 .

It is a super-3 number, since 3×199686964³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199686899 and 199686908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468219 + ... + 1468354.

It is an arithmetic number, because the mean of its divisors is an integer number (30834027).

Almost surely, 2^199686964 is an apocalyptic number.

It is an amenable number.

199686964 is a deficient number, since it is larger than the sum of its proper divisors (170321360).

199686964 is a wasteful number, since it uses less digits than its factorization.

199686964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936594 (or 2936592 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 58.

The square root of 199686964 is about 14131.0637957657. The cubic root of 199686964 is about 584.4982807157.

The spelling of 199686964 in words is "one hundred ninety-nine million, six hundred eighty-six thousand, nine hundred sixty-four".