7199444891 has 4 divisors (see below), whose sum is σ = 7214994912. Its totient is φ = 7183894872.

The previous prime is 7199444873. The next prime is 7199444947. The reversal of 7199444891 is 1984449917.

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

It is a cyclic number.

It is not a de Polignac number, because 7199444891 - 2¹⁴ = 7199428507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7199444821) 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, 7774316 + ... + 7775241.

It is an arithmetic number, because the mean of its divisors is an integer number (1803748728).

Almost surely, 2^7199444891 is an apocalyptic number.

7199444891 is a deficient number, since it is larger than the sum of its proper divisors (15550021).

7199444891 is a wasteful number, since it uses less digits than its factorization.

7199444891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15550020.

The product of its digits is 2612736, while the sum is 56.

The square root of 7199444891 is about 84849.5426681841. The cubic root of 7199444891 is about 1930.9291427649.

The spelling of 7199444891 in words is "seven billion, one hundred ninety-nine million, four hundred forty-four thousand, eight hundred ninety-one".