165790787 has 2 divisors, whose sum is σ = 165790788. Its totient is φ = 165790786.

The previous prime is 165790769. The next prime is 165790819. The reversal of 165790787 is 787097561.

It is a weak prime.

It is an emirp because it is prime and its reverse (787097561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165790787 - 2¹⁴ = 165774403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165790717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82895393 + 82895394.

It is an arithmetic number, because the mean of its divisors is an integer number (82895394).

Almost surely, 2^165790787 is an apocalyptic number.

165790787 is a deficient number, since it is larger than the sum of its proper divisors (1).

165790787 is an equidigital number, since it uses as much as digits as its factorization.

165790787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 740880, while the sum is 50.

The square root of 165790787 is about 12875.9771279697. The cubic root of 165790787 is about 549.3554841395.

The spelling of 165790787 in words is "one hundred sixty-five million, seven hundred ninety thousand, seven hundred eighty-seven".