196990587 has 12 divisors (see below), whose sum is σ = 284717160. Its totient is φ = 131246208.

The previous prime is 196990517. The next prime is 196990597. The reversal of 196990587 is 785099691.

It is not a de Polignac number, because 196990587 - 2⁷ = 196990459 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (196990517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11208 + ... + 22794.

It is an arithmetic number, because the mean of its divisors is an integer number (23726430).

Almost surely, 2^196990587 is an apocalyptic number.

196990587 is a deficient number, since it is larger than the sum of its proper divisors (87726573).

196990587 is a wasteful number, since it uses less digits than its factorization.

196990587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13482 (or 13479 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 196990587 is about 14035.3335193717. Note that the first 3 decimals coincide. The cubic root of 196990587 is about 581.8555191008.

The spelling of 196990587 in words is "one hundred ninety-six million, nine hundred ninety thousand, five hundred eighty-seven".