811897103 has 2 divisors, whose sum is σ = 811897104. Its totient is φ = 811897102.

The previous prime is 811897087. The next prime is 811897117. The reversal of 811897103 is 301798118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 811897103 - 2⁴ = 811897087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811897123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405948551 + 405948552.

It is an arithmetic number, because the mean of its divisors is an integer number (405948552).

Almost surely, 2^811897103 is an apocalyptic number.

811897103 is a deficient number, since it is larger than the sum of its proper divisors (1).

811897103 is an equidigital number, since it uses as much as digits as its factorization.

811897103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 811897103 is about 28493.8081519477. The cubic root of 811897103 is about 932.8969300650.

The spelling of 811897103 in words is "eight hundred eleven million, eight hundred ninety-seven thousand, one hundred three".