2691944193 has 4 divisors (see below), whose sum is σ = 3589258928. Its totient is φ = 1794629460.

The previous prime is 2691944191. The next prime is 2691944201. The reversal of 2691944193 is 3914491962.

It is a happy number.

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 not a de Polignac number, because 2691944193 - 2¹ = 2691944191 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2691944191) 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, 448657363 + ... + 448657368.

It is an arithmetic number, because the mean of its divisors is an integer number (897314732).

Almost surely, 2^2691944193 is an apocalyptic number.

It is an amenable number.

2691944193 is a deficient number, since it is larger than the sum of its proper divisors (897314735).

2691944193 is an equidigital number, since it uses as much as digits as its factorization.

2691944193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897314734.

The product of its digits is 419904, while the sum is 48.

The square root of 2691944193 is about 51883.9492810638. The cubic root of 2691944193 is about 1391.0903910720.

The spelling of 2691944193 in words is "two billion, six hundred ninety-one million, nine hundred forty-four thousand, one hundred ninety-three".