138851963 has 2 divisors, whose sum is σ = 138851964. Its totient is φ = 138851962.

The previous prime is 138851929. The next prime is 138852017. The reversal of 138851963 is 369158831.

It is a weak prime.

It is an emirp because it is prime and its reverse (369158831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138851963 - 2¹⁰ = 138850939 is a prime.

It is not a weakly prime, because it can be changed into another prime (138851663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69425981 + 69425982.

It is an arithmetic number, because the mean of its divisors is an integer number (69425982).

Almost surely, 2^138851963 is an apocalyptic number.

138851963 is a deficient number, since it is larger than the sum of its proper divisors (1).

138851963 is an equidigital number, since it uses as much as digits as its factorization.

138851963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 138851963 is about 11783.5462828471. The cubic root of 138851963 is about 517.8261853288.

The spelling of 138851963 in words is "one hundred thirty-eight million, eight hundred fifty-one thousand, nine hundred sixty-three".