165139133 has 2 divisors, whose sum is σ = 165139134. Its totient is φ = 165139132.

The previous prime is 165139109. The next prime is 165139159. The reversal of 165139133 is 331931561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85340644 + 79798489 = 9238^2 + 8933^2 .

It is a cyclic number.

It is not a de Polignac number, because 165139133 - 2¹² = 165135037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165139133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165139193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82569566 + 82569567.

It is an arithmetic number, because the mean of its divisors is an integer number (82569567).

Almost surely, 2^165139133 is an apocalyptic number.

It is an amenable number.

165139133 is a deficient number, since it is larger than the sum of its proper divisors (1).

165139133 is an equidigital number, since it uses as much as digits as its factorization.

165139133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 32.

The square root of 165139133 is about 12850.6471821461. The cubic root of 165139133 is about 548.6347771010.

The spelling of 165139133 in words is "one hundred sixty-five million, one hundred thirty-nine thousand, one hundred thirty-three".