138132437 has 2 divisors, whose sum is σ = 138132438. Its totient is φ = 138132436.

The previous prime is 138132431. The next prime is 138132461. The reversal of 138132437 is 734231831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 3363556 = 11609^2 + 1834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138132437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138132431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69066218 + 69066219.

It is an arithmetic number, because the mean of its divisors is an integer number (69066219).

Almost surely, 2^138132437 is an apocalyptic number.

It is an amenable number.

138132437 is a deficient number, since it is larger than the sum of its proper divisors (1).

138132437 is an equidigital number, since it uses as much as digits as its factorization.

138132437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 138132437 is about 11752.9756657623. The cubic root of 138132437 is about 516.9301834846.

The spelling of 138132437 in words is "one hundred thirty-eight million, one hundred thirty-two thousand, four hundred thirty-seven".