2135723 has 2 divisors, whose sum is σ = 2135724. Its totient is φ = 2135722.

The previous prime is 2135719. The next prime is 2135729. The reversal of 2135723 is 3275312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2135723 - 2² = 2135719 is a prime.

It is a super-2 number, since 2×2135723² = 9122625465458, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 3³ + 5 + 7⁵ + 2²¹ + 3⁹ .

It is equal to p₁₅₈₂₆₁ and since 2135723 and 158261 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2135729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067861 + 1067862.

It is an arithmetic number, because the mean of its divisors is an integer number (1067862).

2^2135723 is an apocalyptic number.

2135723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135723 is an equidigital number, since it uses as much as digits as its factorization.

2135723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 23.

The square root of 2135723 is about 1461.4113041851. The cubic root of 2135723 is about 128.7799666320.

The spelling of 2135723 in words is "two million, one hundred thirty-five thousand, seven hundred twenty-three".