138797893 has 16 divisors (see below), whose sum is σ = 158135040. Its totient is φ = 120852864.

The previous prime is 138797873. The next prime is 138797929. The reversal of 138797893 is 398797831.

It is a cyclic number.

It is not a de Polignac number, because 138797893 - 2⁵ = 138797861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138797873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18648 + ... + 25006.

It is an arithmetic number, because the mean of its divisors is an integer number (9883440).

Almost surely, 2^138797893 is an apocalyptic number.

138797893 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

138797893 is a deficient number, since it is larger than the sum of its proper divisors (19337147).

138797893 is a wasteful number, since it uses less digits than its factorization.

138797893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6468.

The product of its digits is 2286144, while the sum is 55.

The square root of 138797893 is about 11781.2517586206. The cubic root of 138797893 is about 517.7589614636.

The spelling of 138797893 in words is "one hundred thirty-eight million, seven hundred ninety-seven thousand, eight hundred ninety-three".