813671611 has 2 divisors, whose sum is σ = 813671612. Its totient is φ = 813671610.

The previous prime is 813671597. The next prime is 813671623. The reversal of 813671611 is 116176318.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813671611 is a prime.

It is a super-2 number, since 2×813671611² = 1324122981094670642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (813671641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406835805 + 406835806.

It is an arithmetic number, because the mean of its divisors is an integer number (406835806).

Almost surely, 2^813671611 is an apocalyptic number.

813671611 is a deficient number, since it is larger than the sum of its proper divisors (1).

813671611 is an equidigital number, since it uses as much as digits as its factorization.

813671611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 813671611 is about 28524.9296405793. The cubic root of 813671611 is about 933.5760918563.

The spelling of 813671611 in words is "eight hundred thirteen million, six hundred seventy-one thousand, six hundred eleven".