16014991 has 4 divisors (see below), whose sum is σ = 16180192. Its totient is φ = 15849792.

The previous prime is 16014983. The next prime is 16014997. The reversal of 16014991 is 19941061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19941061 = 7 ⋅2848723.

It is a cyclic number.

It is not a de Polignac number, because 16014991 - 2³ = 16014983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16014997) 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, 82455 + ... + 82648.

It is an arithmetic number, because the mean of its divisors is an integer number (4045048).

Almost surely, 2^16014991 is an apocalyptic number.

16014991 is a deficient number, since it is larger than the sum of its proper divisors (165201).

16014991 is an equidigital number, since it uses as much as digits as its factorization.

16014991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165200.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 16014991 is about 4001.8734362796. The cubic root of 16014991 is about 252.0628832320.

It can be divided in two parts, 160 and 14991, that added together give a palindrome (15151).

The spelling of 16014991 in words is "sixteen million, fourteen thousand, nine hundred ninety-one".