186890057 has 4 divisors (see below), whose sum is σ = 188254356. Its totient is φ = 185525760.

The previous prime is 186890051. The next prime is 186890059. The reversal of 186890057 is 750098681.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79995136 + 106894921 = 8944^2 + 10339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186890057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (186890051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681944 + ... + 682217.

It is an arithmetic number, because the mean of its divisors is an integer number (47063589).

Almost surely, 2^186890057 is an apocalyptic number.

It is an amenable number.

186890057 is a deficient number, since it is larger than the sum of its proper divisors (1364299).

186890057 is a wasteful number, since it uses less digits than its factorization.

186890057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364298.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 186890057 is about 13670.7738259398. The cubic root of 186890057 is about 571.7358155787.

The spelling of 186890057 in words is "one hundred eighty-six million, eight hundred ninety thousand, fifty-seven".