138950437 has 2 divisors, whose sum is σ = 138950438. Its totient is φ = 138950436.

The previous prime is 138950431. The next prime is 138950443. The reversal of 138950437 is 734059831.

It is a balanced prime because it is at equal distance from previous prime (138950431) and next prime (138950443).

It can be written as a sum of positive squares in only one way, i.e., 130850721 + 8099716 = 11439^2 + 2846^2 .

It is a cyclic number.

It is not a de Polignac number, because 138950437 - 2⁷ = 138950309 is a prime.

It is a super-3 number, since 3×138950437³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138950437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138950431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69475218 + 69475219.

It is an arithmetic number, because the mean of its divisors is an integer number (69475219).

Almost surely, 2^138950437 is an apocalyptic number.

It is an amenable number.

138950437 is a deficient number, since it is larger than the sum of its proper divisors (1).

138950437 is an equidigital number, since it uses as much as digits as its factorization.

138950437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 138950437 is about 11787.7239957508. The cubic root of 138950437 is about 517.9485707451.

The spelling of 138950437 in words is "one hundred thirty-eight million, nine hundred fifty thousand, four hundred thirty-seven".