16860986 has 4 divisors (see below), whose sum is σ = 25291482. Its totient is φ = 8430492.

The previous prime is 16860973. The next prime is 16861003. The reversal of 16860986 is 68906861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68906861 = 293 ⋅235177.

It can be written as a sum of positive squares in only one way, i.e., 11937025 + 4923961 = 3455^2 + 2219^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4215245 + ... + 4215248.

Almost surely, 2^16860986 is an apocalyptic number.

16860986 is a deficient number, since it is larger than the sum of its proper divisors (8430496).

16860986 is an equidigital number, since it uses as much as digits as its factorization.

16860986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8430495.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 16860986 is about 4106.2130972467. The cubic root of 16860986 is about 256.4253690694.

The spelling of 16860986 in words is "sixteen million, eight hundred sixty thousand, nine hundred eighty-six".