138539577 has 16 divisors (see below), whose sum is σ = 201765312. Its totient is φ = 83857920.

The previous prime is 138539563. The next prime is 138539617. The reversal of 138539577 is 775935831.

It is not a de Polignac number, because 138539577 - 2⁴ = 138539561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138539677) 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, 30093 + ... + 34389.

It is an arithmetic number, because the mean of its divisors is an integer number (12610332).

Almost surely, 2^138539577 is an apocalyptic number.

It is an amenable number.

138539577 is a deficient number, since it is larger than the sum of its proper divisors (63225735).

138539577 is a wasteful number, since it uses less digits than its factorization.

138539577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288.

The product of its digits is 793800, while the sum is 48.

The square root of 138539577 is about 11770.2836414421. The cubic root of 138539577 is about 517.4375625387.

The spelling of 138539577 in words is "one hundred thirty-eight million, five hundred thirty-nine thousand, five hundred seventy-seven".