138567479 has 8 divisors (see below), whose sum is σ = 148500960. Its totient is φ = 128959776.

The previous prime is 138567469. The next prime is 138567487. The reversal of 138567479 is 974765831.

138567479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138567479 - 2⁴ = 138567463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138567439) 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, 80564 + ... + 82265.

It is an arithmetic number, because the mean of its divisors is an integer number (18562620).

Almost surely, 2^138567479 is an apocalyptic number.

138567479 is a deficient number, since it is larger than the sum of its proper divisors (9933481).

138567479 is a wasteful number, since it uses less digits than its factorization.

138567479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162889.

The product of its digits is 1270080, while the sum is 50.

The square root of 138567479 is about 11771.4688548201. The cubic root of 138567479 is about 517.4722976762.

The spelling of 138567479 in words is "one hundred thirty-eight million, five hundred sixty-seven thousand, four hundred seventy-nine".