2891337121 has 4 divisors (see below), whose sum is σ = 2926172592. Its totient is φ = 2856501652.

The previous prime is 2891337079. The next prime is 2891337131. The reversal of 2891337121 is 1217331982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2891337121 - 2⁷ = 2891336993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2891337131) 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, 17417611 + ... + 17417776.

It is an arithmetic number, because the mean of its divisors is an integer number (731543148).

Almost surely, 2^2891337121 is an apocalyptic number.

It is an amenable number.

2891337121 is a deficient number, since it is larger than the sum of its proper divisors (34835471).

2891337121 is an equidigital number, since it uses as much as digits as its factorization.

2891337121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34835470.

The product of its digits is 18144, while the sum is 37.

The square root of 2891337121 is about 53771.1551019689. The cubic root of 2891337121 is about 1424.6217723589.

The spelling of 2891337121 in words is "two billion, eight hundred ninety-one million, three hundred thirty-seven thousand, one hundred twenty-one".