165117487 has 2 divisors, whose sum is σ = 165117488. Its totient is φ = 165117486.

The previous prime is 165117457. The next prime is 165117493. The reversal of 165117487 is 784711561.

It is a strong prime.

It is an emirp because it is prime and its reverse (784711561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165117487 - 2¹⁹ = 164593199 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165117427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82558743 + 82558744.

It is an arithmetic number, because the mean of its divisors is an integer number (82558744).

Almost surely, 2^165117487 is an apocalyptic number.

165117487 is a deficient number, since it is larger than the sum of its proper divisors (1).

165117487 is an equidigital number, since it uses as much as digits as its factorization.

165117487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 40.

The square root of 165117487 is about 12849.8049401538. The cubic root of 165117487 is about 548.6108048559.

The spelling of 165117487 in words is "one hundred sixty-five million, one hundred seventeen thousand, four hundred eighty-seven".