16149986 has 4 divisors (see below), whose sum is σ = 24224982. Its totient is φ = 8074992.

The previous prime is 16149901. The next prime is 16149989. The reversal of 16149986 is 68994161.

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., 15452761 + 697225 = 3931^2 + 835^2 .

It is not an unprimeable number, because it can be changed into a prime (16149989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4037495 + ... + 4037498.

Almost surely, 2^16149986 is an apocalyptic number.

16149986 is a deficient number, since it is larger than the sum of its proper divisors (8074996).

16149986 is an equidigital number, since it uses as much as digits as its factorization.

16149986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8074995.

The product of its digits is 93312, while the sum is 44.

The square root of 16149986 is about 4018.7045176275. The cubic root of 16149986 is about 252.7691395493.

The spelling of 16149986 in words is "sixteen million, one hundred forty-nine thousand, nine hundred eighty-six".