165158447 has 2 divisors, whose sum is σ = 165158448. Its totient is φ = 165158446.

The previous prime is 165158437. The next prime is 165158449. The reversal of 165158447 is 744851561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165158447 - 2¹² = 165154351 is a prime.

It is a super-3 number, since 3×165158447³ (a number of 26 digits) contains 333 as substring.

Together with 165158449, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_9247298 and since 165158447 and 9247298 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165158449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82579223 + 82579224.

It is an arithmetic number, because the mean of its divisors is an integer number (82579224).

Almost surely, 2^165158447 is an apocalyptic number.

165158447 is a deficient number, since it is larger than the sum of its proper divisors (1).

165158447 is an equidigital number, since it uses as much as digits as its factorization.

165158447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 41.

The square root of 165158447 is about 12851.3986398368. The cubic root of 165158447 is about 548.6561649631.

The spelling of 165158447 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, four hundred forty-seven".