1373578849 has 2 divisors, whose sum is σ = 1373578850. Its totient is φ = 1373578848.

The previous prime is 1373578831. The next prime is 1373578853. The reversal of 1373578849 is 9488753731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1288810000 + 84768849 = 35900^2 + 9207^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373578849 - 2¹¹ = 1373576801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1373578849.

It is not a weakly prime, because it can be changed into another prime (1373575849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686789424 + 686789425.

It is an arithmetic number, because the mean of its divisors is an integer number (686789425).

Almost surely, 2^1373578849 is an apocalyptic number.

It is an amenable number.

1373578849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373578849 is an equidigital number, since it uses as much as digits as its factorization.

1373578849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 1373578849 is about 37061.8246852472. The cubic root of 1373578849 is about 1111.6068087933.

The spelling of 1373578849 in words is "one billion, three hundred seventy-three million, five hundred seventy-eight thousand, eight hundred forty-nine".