138052681 has 8 divisors (see below), whose sum is σ = 149160704. Its totient is φ = 127014480.

The previous prime is 138052679. The next prime is 138052723. The reversal of 138052681 is 186250831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138052681 - 2¹ = 138052679 is a prime.

It is a super-2 number, since 2×138052681² = 38117085462575522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138052381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13305 + ... + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (18645088).

Almost surely, 2^138052681 is an apocalyptic number.

It is an amenable number.

138052681 is a deficient number, since it is larger than the sum of its proper divisors (11108023).

138052681 is a wasteful number, since it uses less digits than its factorization.

138052681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34911.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 138052681 is about 11749.5821627835. The cubic root of 138052681 is about 516.8306745832.

The spelling of 138052681 in words is "one hundred thirty-eight million, fifty-two thousand, six hundred eighty-one".