2691944943 has 4 divisors (see below), whose sum is σ = 3589259928. Its totient is φ = 1794629960.

The previous prime is 2691944933. The next prime is 2691944989. The reversal of 2691944943 is 3494491962.

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 2691944943 - 2⁸ = 2691944687 is a prime.

It is a super-2 number, since 2×2691944943² = 14493135152286546498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2691944933) 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, 448657488 + ... + 448657493.

It is an arithmetic number, because the mean of its divisors is an integer number (897314982).

Almost surely, 2^2691944943 is an apocalyptic number.

2691944943 is a deficient number, since it is larger than the sum of its proper divisors (897314985).

2691944943 is an equidigital number, since it uses as much as digits as its factorization.

2691944943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897314984.

The product of its digits is 1679616, while the sum is 51.

The square root of 2691944943 is about 51883.9565087321. The cubic root of 2691944943 is about 1391.0905202621.

The spelling of 2691944943 in words is "two billion, six hundred ninety-one million, nine hundred forty-four thousand, nine hundred forty-three".