2091663723 has 8 divisors (see below), whose sum is σ = 2910140928. Its totient is φ = 1333814504.

The previous prime is 2091663703. The next prime is 2091663737. The reversal of 2091663723 is 3273661902.

2091663723 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2091663723 - 2²¹ = 2089566571 is a prime.

It is a super-2 number, since 2×2091663723² = 8750114260228441458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2091663703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15156915 + ... + 15157052.

It is an arithmetic number, because the mean of its divisors is an integer number (363767616).

Almost surely, 2^2091663723 is an apocalyptic number.

2091663723 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2091663723 is a deficient number, since it is larger than the sum of its proper divisors (818477205).

2091663723 is a wasteful number, since it uses less digits than its factorization.

2091663723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30313993.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 2091663723 is about 45734.7102647431. The cubic root of 2091663723 is about 1278.8824317207.

The spelling of 2091663723 in words is "two billion, ninety-one million, six hundred sixty-three thousand, seven hundred twenty-three".