138991503733 has 2 divisors, whose sum is σ = 138991503734. Its totient is φ = 138991503732.

The previous prime is 138991503713. The next prime is 138991503743. The reversal of 138991503733 is 337305199831.

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., 87288929809 + 51702573924 = 295447^2 + 227382^2 .

It is a cyclic number.

It is not a de Polignac number, because 138991503733 - 2²¹ = 138989406581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138991503713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69495751866 + 69495751867.

It is an arithmetic number, because the mean of its divisors is an integer number (69495751867).

Almost surely, 2^138991503733 is an apocalyptic number.

It is an amenable number.

138991503733 is a deficient number, since it is larger than the sum of its proper divisors (1).

138991503733 is an equidigital number, since it uses as much as digits as its factorization.

138991503733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The spelling of 138991503733 in words is "one hundred thirty-eight billion, nine hundred ninety-one million, five hundred three thousand, seven hundred thirty-three".