2091837393 has 10 divisors (see below), whose sum is σ = 3124843634. Its totient is φ = 1394558208.

The previous prime is 2091837379. The next prime is 2091837409. The reversal of 2091837393 is 3937381902.

It can be written as a sum of positive squares in only one way, i.e., 1856920464 + 234916929 = 43092^2 + 15327^2 .

It is not a de Polignac number, because 2091837393 - 2⁶ = 2091837329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2091837353) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12912496 + ... + 12912657.

Almost surely, 2^2091837393 is an apocalyptic number.

It is an amenable number.

2091837393 is a deficient number, since it is larger than the sum of its proper divisors (1033006241).

2091837393 is an equidigital number, since it uses as much as digits as its factorization.

2091837393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25825165 (or 25825156 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 2091837393 is about 45736.6088926584. The cubic root of 2091837393 is about 1278.9178257730.

It can be divided in two parts, 20918 and 37393, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 2091837393 in words is "two billion, ninety-one million, eight hundred thirty-seven thousand, three hundred ninety-three".