138558769 has 8 divisors (see below), whose sum is σ = 140280192. Its totient is φ = 136844400.

The previous prime is 138558767. The next prime is 138558799. The reversal of 138558769 is 967855831.

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 138558769 - 2¹ = 138558767 is a prime.

It is a super-2 number, since 2×138558769² = 38397064933590722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138558767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45282 + ... + 48244.

It is an arithmetic number, because the mean of its divisors is an integer number (17535024).

Almost surely, 2^138558769 is an apocalyptic number.

It is an amenable number.

138558769 is a deficient number, since it is larger than the sum of its proper divisors (1721423).

138558769 is a wasteful number, since it uses less digits than its factorization.

138558769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3527.

The product of its digits is 1814400, while the sum is 52.

The square root of 138558769 is about 11771.0988866800. The cubic root of 138558769 is about 517.4614551173.

The spelling of 138558769 in words is "one hundred thirty-eight million, five hundred fifty-eight thousand, seven hundred sixty-nine".