138385377 has 12 divisors (see below), whose sum is σ = 215266324. Its totient is φ = 85160160.

The previous prime is 138385369. The next prime is 138385381. The reversal of 138385377 is 773583831.

It can be written as a sum of positive squares in 2 ways, for example, as 53450721 + 84934656 = 7311^2 + 9216^2 .

It is not a de Polignac number, because 138385377 - 2³ = 138385369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138385307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 591274 + ... + 591507.

Almost surely, 2^138385377 is an apocalyptic number.

It is an amenable number.

138385377 is a deficient number, since it is larger than the sum of its proper divisors (76880947).

138385377 is a wasteful number, since it uses less digits than its factorization.

138385377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182800 (or 1182797 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 138385377 is about 11763.7314233197. The cubic root of 138385377 is about 517.2455151472.

The spelling of 138385377 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, three hundred seventy-seven".