164135437 has 2 divisors, whose sum is σ = 164135438. Its totient is φ = 164135436.

The previous prime is 164135431. The next prime is 164135443. The reversal of 164135437 is 734531461.

It is a balanced prime because it is at equal distance from previous prime (164135431) and next prime (164135443).

It can be written as a sum of positive squares in only one way, i.e., 85174441 + 78960996 = 9229^2 + 8886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164135437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164135431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82067718 + 82067719.

It is an arithmetic number, because the mean of its divisors is an integer number (82067719).

Almost surely, 2^164135437 is an apocalyptic number.

It is an amenable number.

164135437 is a deficient number, since it is larger than the sum of its proper divisors (1).

164135437 is an equidigital number, since it uses as much as digits as its factorization.

164135437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 164135437 is about 12811.5353100243. The cubic root of 164135437 is about 547.5210052893.

Adding to 164135437 its reverse (734531461), we get a palindrome (898666898).

The spelling of 164135437 in words is "one hundred sixty-four million, one hundred thirty-five thousand, four hundred thirty-seven".