138229587 has 6 divisors (see below), whose sum is σ = 199664972. Its totient is φ = 92153052.

The previous prime is 138229571. The next prime is 138229591. The reversal of 138229587 is 785922831.

It is a happy number.

It is not a de Polignac number, because 138229587 - 2⁴ = 138229571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138229537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7679413 + ... + 7679430.

Almost surely, 2^138229587 is an apocalyptic number.

138229587 is a deficient number, since it is larger than the sum of its proper divisors (61435385).

138229587 is a wasteful number, since it uses less digits than its factorization.

138229587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15358849 (or 15358846 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 138229587 is about 11757.1079352024. The cubic root of 138229587 is about 517.0513425685.

It can be divided in two parts, 13822 and 9587, that added together give a square (23409 = 153²).

The spelling of 138229587 in words is "one hundred thirty-eight million, two hundred twenty-nine thousand, five hundred eighty-seven".