138941901 has 72 divisors (see below), whose sum is σ = 253528704. Its totient is φ = 72817920.

The previous prime is 138941899. The next prime is 138941903. The reversal of 138941901 is 109149831.

It is an interprime number because it is at equal distance from previous prime (138941899) and next prime (138941903).

It is not a de Polignac number, because 138941901 - 2¹ = 138941899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138941903) 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 71 ways as a sum of consecutive naturals, for example, 322156 + ... + 322586.

It is an arithmetic number, because the mean of its divisors is an integer number (3521232).

Almost surely, 2^138941901 is an apocalyptic number.

It is an amenable number.

138941901 is a deficient number, since it is larger than the sum of its proper divisors (114586803).

138941901 is a wasteful number, since it uses less digits than its factorization.

138941901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 138941901 is about 11787.3619185974. The cubic root of 138941901 is about 517.9379643264.

The spelling of 138941901 in words is "one hundred thirty-eight million, nine hundred forty-one thousand, nine hundred one".