813519061 has 2 divisors, whose sum is σ = 813519062. Its totient is φ = 813519060.

The previous prime is 813519059. The next prime is 813519103. The reversal of 813519061 is 160915318.

813519061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723932836 + 89586225 = 26906^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 813519061 - 2¹ = 813519059 is a prime.

It is a super-2 number, since 2×813519061² = 1323626525220643442, which contains 22 as substring.

Together with 813519059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813519041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406759530 + 406759531.

It is an arithmetic number, because the mean of its divisors is an integer number (406759531).

Almost surely, 2^813519061 is an apocalyptic number.

It is an amenable number.

813519061 is a deficient number, since it is larger than the sum of its proper divisors (1).

813519061 is an equidigital number, since it uses as much as digits as its factorization.

813519061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 813519061 is about 28522.2555384388. The cubic root of 813519061 is about 933.5177448392.

The spelling of 813519061 in words is "eight hundred thirteen million, five hundred nineteen thousand, sixty-one".