2138624489 has 2 divisors, whose sum is σ = 2138624490. Its totient is φ = 2138624488.

The previous prime is 2138624407. The next prime is 2138624519. The reversal of 2138624489 is 9844268312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1865548864 + 273075625 = 43192^2 + 16525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138624489 is a prime.

It is a super-2 number, since 2×2138624489² = 9147429409901022242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2138620489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069312244 + 1069312245.

It is an arithmetic number, because the mean of its divisors is an integer number (1069312245).

Almost surely, 2^2138624489 is an apocalyptic number.

It is an amenable number.

2138624489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138624489 is an equidigital number, since it uses as much as digits as its factorization.

2138624489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 47.

The square root of 2138624489 is about 46245.2645035143. The cubic root of 2138624489 is about 1288.3825830109.

The spelling of 2138624489 in words is "two billion, one hundred thirty-eight million, six hundred twenty-four thousand, four hundred eighty-nine".