165487493 has 2 divisors, whose sum is σ = 165487494. Its totient is φ = 165487492.

The previous prime is 165487471. The next prime is 165487499. The reversal of 165487493 is 394784561.

165487493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 24186724 = 11887^2 + 4918^2 .

It is a cyclic number.

It is not a de Polignac number, because 165487493 - 2⁸ = 165487237 is a prime.

It is a super-2 number, since 2×165487493² = 54772220678850098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165487499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82743746 + 82743747.

It is an arithmetic number, because the mean of its divisors is an integer number (82743747).

Almost surely, 2^165487493 is an apocalyptic number.

It is an amenable number.

165487493 is a deficient number, since it is larger than the sum of its proper divisors (1).

165487493 is an equidigital number, since it uses as much as digits as its factorization.

165487493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 165487493 is about 12864.1942227253. The cubic root of 165487493 is about 549.0202867300.

The spelling of 165487493 in words is "one hundred sixty-five million, four hundred eighty-seven thousand, four hundred ninety-three".