2138104509 has 8 divisors (see below), whose sum is σ = 2851223232. Its totient is φ = 1425194400.

The previous prime is 2138104499. The next prime is 2138104511. The reversal of 2138104509 is 9054018312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2138104509 - 2⁵ = 2138104477 is a prime.

It is a super-2 number, since 2×2138104509² = 9142981782812262162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2138104509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138104109) 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, 26424 + ... + 70529.

It is an arithmetic number, because the mean of its divisors is an integer number (356402904).

Almost surely, 2^2138104509 is an apocalyptic number.

It is an amenable number.

2138104509 is a deficient number, since it is larger than the sum of its proper divisors (713118723).

2138104509 is an equidigital number, since it uses as much as digits as its factorization.

2138104509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104307.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 2138104509 is about 46239.6421807090. The cubic root of 2138104509 is about 1288.2781564692.

The spelling of 2138104509 in words is "two billion, one hundred thirty-eight million, one hundred four thousand, five hundred nine".