196812387 has 6 divisors (see below), whose sum is σ = 284284572. Its totient is φ = 131208252.

The previous prime is 196812347. The next prime is 196812401. The reversal of 196812387 is 783218691.

196812387 is a `hidden beast` number, since 196 + 81 + 2 + 387 = 666.

It is not a de Polignac number, because 196812387 - 2²⁴ = 180035171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (196812347) 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 5 ways as a sum of consecutive naturals, for example, 10934013 + ... + 10934030.

It is an arithmetic number, because the mean of its divisors is an integer number (47380762).

Almost surely, 2^196812387 is an apocalyptic number.

196812387 is a deficient number, since it is larger than the sum of its proper divisors (87472185).

196812387 is a wasteful number, since it uses less digits than its factorization.

196812387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21868049 (or 21868046 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 196812387 is about 14028.9838192223. The cubic root of 196812387 is about 581.6800150557.

The spelling of 196812387 in words is "one hundred ninety-six million, eight hundred twelve thousand, three hundred eighty-seven".