2190345723 has 12 divisors (see below), whose sum is σ = 3166806240. Its totient is φ = 1458858096.

The previous prime is 2190345719. The next prime is 2190345733. The reversal of 2190345723 is 3275430912.

It is not a de Polignac number, because 2190345723 - 2² = 2190345719 is a prime.

It is a super-2 number, since 2×2190345723² = 9595228772528785458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2190345713) 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, 104211 + ... + 123452.

It is an arithmetic number, because the mean of its divisors is an integer number (263900520).

Almost surely, 2^2190345723 is an apocalyptic number.

2190345723 is a deficient number, since it is larger than the sum of its proper divisors (976460517).

2190345723 is a wasteful number, since it uses less digits than its factorization.

2190345723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228738 (or 228735 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 2190345723 is about 46801.1295056006. The cubic root of 2190345723 is about 1298.6861920140.

The spelling of 2190345723 in words is "two billion, one hundred ninety million, three hundred forty-five thousand, seven hundred twenty-three".