165158437 has 2 divisors, whose sum is σ = 165158438. Its totient is φ = 165158436.

The previous prime is 165158387. The next prime is 165158447. The reversal of 165158437 is 734851561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136095556 + 29062881 = 11666^2 + 5391^2 .

It is a cyclic number.

It is not a de Polignac number, because 165158437 - 2¹¹ = 165156389 is a prime.

It is a super-3 number, since 3×165158437³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is equal to p_9247297 and since 165158437 and 9247297 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165158437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165158447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82579218 + 82579219.

It is an arithmetic number, because the mean of its divisors is an integer number (82579219).

Almost surely, 2^165158437 is an apocalyptic number.

It is an amenable number.

165158437 is a deficient number, since it is larger than the sum of its proper divisors (1).

165158437 is an equidigital number, since it uses as much as digits as its factorization.

165158437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 165158437 is about 12851.3982507741. The cubic root of 165158437 is about 548.6561538898.

The spelling of 165158437 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, four hundred thirty-seven".