138277841 has 8 divisors (see below), whose sum is σ = 150955560. Its totient is φ = 125891712.

The previous prime is 138277831. The next prime is 138277859. The reversal of 138277841 is 148772831.

It can be written as a sum of positive squares in 4 ways, for example, as 450241 + 137827600 = 671^2 + 11740^2 .

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

It is not a de Polignac number, because 138277841 - 2¹⁸ = 138015697 is a prime.

It is a super-2 number, since 2×138277841² = 38241522623242562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138277831) 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, 71906 + ... + 73803.

It is an arithmetic number, because the mean of its divisors is an integer number (18869445).

Almost surely, 2^138277841 is an apocalyptic number.

It is an amenable number.

138277841 is a deficient number, since it is larger than the sum of its proper divisors (12677719).

138277841 is a wasteful number, since it uses less digits than its factorization.

138277841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145795.

The product of its digits is 75264, while the sum is 41.

The square root of 138277841 is about 11759.1598764538. The cubic root of 138277841 is about 517.1115006802. Note that the first 3 decimals are identical.

The spelling of 138277841 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, eight hundred forty-one".