16130991 has 4 divisors (see below), whose sum is σ = 21507992. Its totient is φ = 10753992.

The previous prime is 16130971. The next prime is 16130993. The reversal of 16130991 is 19903161.

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

It is not a de Polignac number, because 16130991 - 2⁹ = 16130479 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 (16130993) 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, 2688496 + ... + 2688501.

It is an arithmetic number, because the mean of its divisors is an integer number (5376998).

Almost surely, 2^16130991 is an apocalyptic number.

16130991 is a deficient number, since it is larger than the sum of its proper divisors (5377001).

16130991 is an equidigital number, since it uses as much as digits as its factorization.

16130991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377000.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 16130991 is about 4016.3404985135. The cubic root of 16130991 is about 252.6700015185.

The spelling of 16130991 in words is "sixteen million, one hundred thirty thousand, nine hundred ninety-one".