165807743 has 2 divisors, whose sum is σ = 165807744. Its totient is φ = 165807742.

The previous prime is 165807739. The next prime is 165807751. The reversal of 165807743 is 347708561.

It is a weak prime.

It is an emirp because it is prime and its reverse (347708561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165807743 - 2² = 165807739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165807743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165807773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82903871 + 82903872.

It is an arithmetic number, because the mean of its divisors is an integer number (82903872).

Almost surely, 2^165807743 is an apocalyptic number.

165807743 is a deficient number, since it is larger than the sum of its proper divisors (1).

165807743 is an equidigital number, since it uses as much as digits as its factorization.

165807743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 165807743 is about 12876.6355466014. The cubic root of 165807743 is about 549.3742116660.

The spelling of 165807743 in words is "one hundred sixty-five million, eight hundred seven thousand, seven hundred forty-three".