165131773 has 2 divisors, whose sum is σ = 165131774. Its totient is φ = 165131772.

The previous prime is 165131749. The next prime is 165131797. The reversal of 165131773 is 377131561.

It is a balanced prime because it is at equal distance from previous prime (165131749) and next prime (165131797).

It can be written as a sum of positive squares in only one way, i.e., 146967129 + 18164644 = 12123^2 + 4262^2 .

It is an emirp because it is prime and its reverse (377131561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165131773 - 2⁵ = 165131741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165131273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82565886 + 82565887.

It is an arithmetic number, because the mean of its divisors is an integer number (82565887).

Almost surely, 2^165131773 is an apocalyptic number.

It is an amenable number.

165131773 is a deficient number, since it is larger than the sum of its proper divisors (1).

165131773 is an equidigital number, since it uses as much as digits as its factorization.

165131773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13230, while the sum is 34.

The square root of 165131773 is about 12850.3608120550. The cubic root of 165131773 is about 548.6266263741.

The spelling of 165131773 in words is "one hundred sixty-five million, one hundred thirty-one thousand, seven hundred seventy-three".