2091723 has 8 divisors (see below), whose sum is σ = 2800848. Its totient is φ = 1388544.

The previous prime is 2091709. The next prime is 2091737. The reversal of 2091723 is 3271902.

It is an interprime number because it is at equal distance from previous prime (2091709) and next prime (2091737).

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

It is not a de Polignac number, because 2091723 - 2⁴ = 2091707 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2091693 and 2091702.

It is not an unprimeable number, because it can be changed into a prime (2091703) 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, 586 + ... + 2127.

It is an arithmetic number, because the mean of its divisors is an integer number (350106).

2^2091723 is an apocalyptic number.

2091723 is a deficient number, since it is larger than the sum of its proper divisors (709125).

2091723 is a wasteful number, since it uses less digits than its factorization.

2091723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 2091723 is about 1446.2790187236. The cubic root of 2091723 is about 127.8894512630.

The spelling of 2091723 in words is "two million, ninety-one thousand, seven hundred twenty-three".