2891390343 has 16 divisors (see below), whose sum is σ = 3908148960. Its totient is φ = 1901293056.

The previous prime is 2891390309. The next prime is 2891390357. The reversal of 2891390343 is 3430931982.

It is not a de Polignac number, because 2891390343 - 2⁸ = 2891390087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2891390295 and 2891390304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891390543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42123 + ... + 86931.

It is an arithmetic number, because the mean of its divisors is an integer number (244259310).

Almost surely, 2^2891390343 is an apocalyptic number.

2891390343 is a deficient number, since it is larger than the sum of its proper divisors (1016758617).

2891390343 is a wasteful number, since it uses less digits than its factorization.

2891390343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45106.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 2891390343 is about 53771.6499932818. The cubic root of 2891390343 is about 1424.6305134997.

The spelling of 2891390343 in words is "two billion, eight hundred ninety-one million, three hundred ninety thousand, three hundred forty-three".