5043978509 has 2 divisors, whose sum is σ = 5043978510. Its totient is φ = 5043978508.

The previous prime is 5043978493. The next prime is 5043978539. The reversal of 5043978509 is 9058793405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3687161284 + 1356817225 = 60722^2 + 36835^2 .

It is a cyclic number.

It is not a de Polignac number, because 5043978509 - 2⁴ = 5043978493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5043978539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2521989254 + 2521989255.

It is an arithmetic number, because the mean of its divisors is an integer number (2521989255).

Almost surely, 2^5043978509 is an apocalyptic number.

It is an amenable number.

5043978509 is a deficient number, since it is larger than the sum of its proper divisors (1).

5043978509 is an equidigital number, since it uses as much as digits as its factorization.

5043978509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 5043978509 is about 71020.9723180414. The cubic root of 5043978509 is about 1714.9747985655.

The spelling of 5043978509 in words is "five billion, forty-three million, nine hundred seventy-eight thousand, five hundred nine".