196912887 has 16 divisors (see below), whose sum is σ = 279871200. Its totient is φ = 122719232.

The previous prime is 196912883. The next prime is 196912907. The reversal of 196912887 is 788219691.

It is a cyclic number.

It is not a de Polignac number, because 196912887 - 2² = 196912883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196912883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5358 + ... + 20555.

It is an arithmetic number, because the mean of its divisors is an integer number (17491950).

Almost surely, 2^196912887 is an apocalyptic number.

196912887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

196912887 is a deficient number, since it is larger than the sum of its proper divisors (82958313).

196912887 is a wasteful number, since it uses less digits than its factorization.

196912887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26082.

The product of its digits is 435456, while the sum is 51.

The square root of 196912887 is about 14032.5652323444. The cubic root of 196912887 is about 581.7790076289.

It can be divided in two parts, 19691 and 2887, that added together give a triangular number (22578 = T₂₁₂).

The spelling of 196912887 in words is "one hundred ninety-six million, nine hundred twelve thousand, eight hundred eighty-seven".