10199986 has 4 divisors (see below), whose sum is σ = 15299982. Its totient is φ = 5099992.

The previous prime is 10199977. The next prime is 10199999. The reversal of 10199986 is 68999101.

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

It can be written as a sum of positive squares in only one way, i.e., 10118761 + 81225 = 3181^2 + 285^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2549995 + ... + 2549998.

Almost surely, 2^10199986 is an apocalyptic number.

10199986 is a deficient number, since it is larger than the sum of its proper divisors (5099996).

10199986 is an equidigital number, since it uses as much as digits as its factorization.

10199986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5099995.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 10199986 is about 3193.7416927485. The cubic root of 10199986 is about 216.8701893033.

The spelling of 10199986 in words is "ten million, one hundred ninety-nine thousand, nine hundred eighty-six".