811897107 has 16 divisors (see below), whose sum is σ = 1238345472. Its totient is φ = 463502880.

The previous prime is 811897103. The next prime is 811897117. The reversal of 811897107 is 701798118.

It is a happy number.

It is not a de Polignac number, because 811897107 - 2² = 811897103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (811897103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5193 + ... + 40629.

It is an arithmetic number, because the mean of its divisors is an integer number (77396592).

Almost surely, 2^811897107 is an apocalyptic number.

811897107 is a deficient number, since it is larger than the sum of its proper divisors (426448365).

811897107 is a wasteful number, since it uses less digits than its factorization.

811897107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36538.

The product of its (nonzero) digits is 28224, while the sum is 42.

The square root of 811897107 is about 28493.8082221384. The cubic root of 811897107 is about 932.8969315971.

The spelling of 811897107 in words is "eight hundred eleven million, eight hundred ninety-seven thousand, one hundred seven".