2078243091 has 12 divisors (see below), whose sum is σ = 3006349632. Its totient is φ = 1383444816.

The previous prime is 2078243087. The next prime is 2078243117. The reversal of 2078243091 is 1903428702.

It is not a de Polignac number, because 2078243091 - 2² = 2078243087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2078243021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164451 + ... + 176636.

It is an arithmetic number, because the mean of its divisors is an integer number (250529136).

Almost surely, 2^2078243091 is an apocalyptic number.

2078243091 is a deficient number, since it is larger than the sum of its proper divisors (928106541).

2078243091 is a wasteful number, since it uses less digits than its factorization.

2078243091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341770 (or 341767 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2078243091 is about 45587.7515457826. The cubic root of 2078243091 is about 1276.1413521454.

The spelling of 2078243091 in words is "two billion, seventy-eight million, two hundred forty-three thousand, ninety-one".