165910903 has 2 divisors, whose sum is σ = 165910904. Its totient is φ = 165910902.

The previous prime is 165910867. The next prime is 165910909. The reversal of 165910903 is 309019561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165910903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165910909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82955451 + 82955452.

It is an arithmetic number, because the mean of its divisors is an integer number (82955452).

Almost surely, 2^165910903 is an apocalyptic number.

165910903 is a deficient number, since it is larger than the sum of its proper divisors (1).

165910903 is an equidigital number, since it uses as much as digits as its factorization.

165910903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 165910903 is about 12880.6406284781. The cubic root of 165910903 is about 549.4881220967.

The spelling of 165910903 in words is "one hundred sixty-five million, nine hundred ten thousand, nine hundred three".