165145537 has 2 divisors, whose sum is σ = 165145538. Its totient is φ = 165145536.

The previous prime is 165145489. The next prime is 165145567. The reversal of 165145537 is 735541561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164454976 + 690561 = 12824^2 + 831^2 .

It is an emirp because it is prime and its reverse (735541561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165145537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165145496 and 165145505.

It is not a weakly prime, because it can be changed into another prime (165145567) 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, 82572768 + 82572769.

It is an arithmetic number, because the mean of its divisors is an integer number (82572769).

Almost surely, 2^165145537 is an apocalyptic number.

It is an amenable number.

165145537 is a deficient number, since it is larger than the sum of its proper divisors (1).

165145537 is an equidigital number, since it uses as much as digits as its factorization.

165145537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63000, while the sum is 37.

The square root of 165145537 is about 12850.8963500606. The cubic root of 165145537 is about 548.6418689224.

The spelling of 165145537 in words is "one hundred sixty-five million, one hundred forty-five thousand, five hundred thirty-seven".