2138523607 has 8 divisors (see below), whose sum is σ = 2333745792. Its totient is φ = 1943436600.

The previous prime is 2138523593. The next prime is 2138523631. The reversal of 2138523607 is 7063258312.

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 2138523607 - 2¹⁵ = 2138490839 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 (2138523407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838 + ... + 65404.

It is an arithmetic number, because the mean of its divisors is an integer number (291718224).

Almost surely, 2^2138523607 is an apocalyptic number.

2138523607 is a deficient number, since it is larger than the sum of its proper divisors (195222185).

2138523607 is a wasteful number, since it uses less digits than its factorization.

2138523607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67589.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 2138523607 is about 46244.1737627563. The cubic root of 2138523607 is about 1288.3623244045.

The spelling of 2138523607 in words is "two billion, one hundred thirty-eight million, five hundred twenty-three thousand, six hundred seven".