138743801 has 24 divisors (see below), whose sum is σ = 168144960. Its totient is φ = 111988800.

The previous prime is 138743789. The next prime is 138743827. The reversal of 138743801 is 108347831.

138743801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-138743801 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138743831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1373651 + ... + 1373751.

It is an arithmetic number, because the mean of its divisors is an integer number (7006040).

Almost surely, 2^138743801 is an apocalyptic number.

It is an amenable number.

138743801 is a deficient number, since it is larger than the sum of its proper divisors (29401159).

138743801 is an equidigital number, since it uses as much as digits as its factorization.

138743801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 138743801 is about 11778.9558535551. The cubic root of 138743801 is about 517.6916927749.

The spelling of 138743801 in words is "one hundred thirty-eight million, seven hundred forty-three thousand, eight hundred one".