138963401 has 16 divisors (see below), whose sum is σ = 150543360. Its totient is φ = 127937040.

The previous prime is 138963373. The next prime is 138963439. The reversal of 138963401 is 104369831.

It is not a de Polignac number, because 138963401 - 2¹⁸ = 138701257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138963481) 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 in 15 ways as a sum of consecutive naturals, for example, 69230 + ... + 71208.

It is an arithmetic number, because the mean of its divisors is an integer number (9408960).

Almost surely, 2^138963401 is an apocalyptic number.

It is an amenable number.

138963401 is a deficient number, since it is larger than the sum of its proper divisors (11579959).

138963401 is a wasteful number, since it uses less digits than its factorization.

138963401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 138963401 is about 11788.2738770356. The cubic root of 138963401 is about 517.9646783506.

The spelling of 138963401 in words is "one hundred thirty-eight million, nine hundred sixty-three thousand, four hundred one".