165041047 has 2 divisors, whose sum is σ = 165041048. Its totient is φ = 165041046.

The previous prime is 165041039. The next prime is 165041081. The reversal of 165041047 is 740140561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165041047 - 2³ = 165041039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165041027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82520523 + 82520524.

It is an arithmetic number, because the mean of its divisors is an integer number (82520524).

Almost surely, 2^165041047 is an apocalyptic number.

165041047 is a deficient number, since it is larger than the sum of its proper divisors (1).

165041047 is an equidigital number, since it uses as much as digits as its factorization.

165041047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 165041047 is about 12846.8302316174. The cubic root of 165041047 is about 548.5261332611.

The spelling of 165041047 in words is "one hundred sixty-five million, forty-one thousand, forty-seven".