2158069 has 2 divisors, whose sum is σ = 2158070. Its totient is φ = 2158068.

The previous prime is 2158061. The next prime is 2158073. The reversal of 2158069 is 9608512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 1030225 = 1062^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158069 - 2³ = 2158061 is a prime.

It is a super-2 number, since 2×2158069² = 9314523617522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2158069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2158061) 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 as a sum of consecutive naturals, namely, 1079034 + 1079035.

It is an arithmetic number, because the mean of its divisors is an integer number (1079035).

2^2158069 is an apocalyptic number.

It is an amenable number.

2158069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158069 is an equidigital number, since it uses as much as digits as its factorization.

2158069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2158069 is about 1469.0367592406. The cubic root of 2158069 is about 129.2275494230.

The spelling of 2158069 in words is "two million, one hundred fifty-eight thousand, sixty-nine".