186990897 has 8 divisors (see below), whose sum is σ = 260161344. Its totient is φ = 119240528.

The previous prime is 186990857. The next prime is 186990899. The reversal of 186990897 is 798099681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 186990897 - 2¹¹ = 186988849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (186990899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1354938 + ... + 1355075.

It is an arithmetic number, because the mean of its divisors is an integer number (32520168).

Almost surely, 2^186990897 is an apocalyptic number.

It is an amenable number.

186990897 is a deficient number, since it is larger than the sum of its proper divisors (73170447).

186990897 is a wasteful number, since it uses less digits than its factorization.

186990897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710039.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 186990897 is about 13674.4614884828. The cubic root of 186990897 is about 571.8386273143.

The spelling of 186990897 in words is "one hundred eighty-six million, nine hundred ninety thousand, eight hundred ninety-seven".