813413789 has 2 divisors, whose sum is σ = 813413790. Its totient is φ = 813413788.

The previous prime is 813413761. The next prime is 813413827. The reversal of 813413789 is 987314318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 599025625 + 214388164 = 24475^2 + 14642^2 .

It is a cyclic number.

It is not a de Polignac number, because 813413789 - 2⁸ = 813413533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813413749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406706894 + 406706895.

It is an arithmetic number, because the mean of its divisors is an integer number (406706895).

Almost surely, 2^813413789 is an apocalyptic number.

It is an amenable number.

813413789 is a deficient number, since it is larger than the sum of its proper divisors (1).

813413789 is an equidigital number, since it uses as much as digits as its factorization.

813413789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 813413789 is about 28520.4100426344. The cubic root of 813413789 is about 933.4774763628.

The spelling of 813413789 in words is "eight hundred thirteen million, four hundred thirteen thousand, seven hundred eighty-nine".