1165890443 has 2 divisors, whose sum is σ = 1165890444. Its totient is φ = 1165890442.

The previous prime is 1165890431. The next prime is 1165890491. The reversal of 1165890443 is 3440985611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1165890443 - 2²⁴ = 1149113227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1165890443.

It is not a weakly prime, because it can be changed into another prime (1165890403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582945221 + 582945222.

It is an arithmetic number, because the mean of its divisors is an integer number (582945222).

Almost surely, 2^1165890443 is an apocalyptic number.

1165890443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165890443 is an equidigital number, since it uses as much as digits as its factorization.

1165890443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1165890443 is about 34145.1379115680. The cubic root of 1165890443 is about 1052.4930760110.

The spelling of 1165890443 in words is "one billion, one hundred sixty-five million, eight hundred ninety thousand, four hundred forty-three".