2309490091 has 4 divisors (see below), whose sum is σ = 2313385272. Its totient is φ = 2305594912.

The previous prime is 2309490037. The next prime is 2309490101. The reversal of 2309490091 is 1900949032.

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 2309490091 - 2⁹ = 2309489579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2309490091.

It is not an unprimeable number, because it can be changed into a prime (2309490031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946701 + ... + 1947886.

It is an arithmetic number, because the mean of its divisors is an integer number (578346318).

Almost surely, 2^2309490091 is an apocalyptic number.

2309490091 is a deficient number, since it is larger than the sum of its proper divisors (3895181).

2309490091 is an equidigital number, since it uses as much as digits as its factorization.

2309490091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3895180.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 2309490091 is about 48057.1544205439. The cubic root of 2309490091 is about 1321.8191345935.

The spelling of 2309490091 in words is "two billion, three hundred nine million, four hundred ninety thousand, ninety-one".