138241479 has 8 divisors (see below), whose sum is σ = 185023872. Its totient is φ = 91810040.

The previous prime is 138241471. The next prime is 138241531. The reversal of 138241479 is 974142831.

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 138241479 - 2³ = 138241471 is a prime.

It is a super-2 number, since 2×138241479² = 38221413032214882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138241471) 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, 86817 + ... + 88394.

It is an arithmetic number, because the mean of its divisors is an integer number (23127984).

Almost surely, 2^138241479 is an apocalyptic number.

138241479 is a deficient number, since it is larger than the sum of its proper divisors (46782393).

138241479 is a wasteful number, since it uses less digits than its factorization.

138241479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175477.

The product of its digits is 48384, while the sum is 39.

The square root of 138241479 is about 11757.6136609433. The cubic root of 138241479 is about 517.0661695877.

The spelling of 138241479 in words is "one hundred thirty-eight million, two hundred forty-one thousand, four hundred seventy-nine".