2138532479 has 8 divisors (see below), whose sum is σ = 2348960640. Its totient is φ = 1937891736.

The previous prime is 2138532397. The next prime is 2138532491. The reversal of 2138532479 is 9742358312.

It is a happy number.

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 2138532479 - 2¹² = 2138528383 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 (2138532379) 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, 2446397 + ... + 2447270.

It is an arithmetic number, because the mean of its divisors is an integer number (293620080).

Almost surely, 2^2138532479 is an apocalyptic number.

2138532479 is a deficient number, since it is larger than the sum of its proper divisors (210428161).

2138532479 is a wasteful number, since it uses less digits than its factorization.

2138532479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4893709.

The product of its digits is 362880, while the sum is 44.

The square root of 2138532479 is about 46244.2696882543. The cubic root of 2138532479 is about 1288.3641060596.

The spelling of 2138532479 in words is "two billion, one hundred thirty-eight million, five hundred thirty-two thousand, four hundred seventy-nine".