213456986 has 16 divisors (see below), whose sum is σ = 328686336. Its totient is φ = 103918416.

The previous prime is 213456983. The next prime is 213457003. The reversal of 213456986 is 689654312.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213456983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12755 + ... + 24281.

It is an arithmetic number, because the mean of its divisors is an integer number (20542896).

Almost surely, 2^213456986 is an apocalyptic number.

213456986 is a deficient number, since it is larger than the sum of its proper divisors (115229350).

213456986 is a wasteful number, since it uses less digits than its factorization.

213456986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11773.

The product of its digits is 311040, while the sum is 44.

The square root of 213456986 is about 14610.1672132799. The cubic root of 213456986 is about 597.6360559198.

The spelling of 213456986 in words is "two hundred thirteen million, four hundred fifty-six thousand, nine hundred eighty-six".