809698955 has 16 divisors (see below), whose sum is σ = 1071905184. Its totient is φ = 583345920.

The previous prime is 809698823. The next prime is 809698957. The reversal of 809698955 is 559896908.

It is not a de Polignac number, because 809698955 - 2¹⁸ = 809436811 is a prime.

It is a super-2 number, since 2×809698955² = 1311224795456184050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 809698894 and 809698903.

It is not an unprimeable number, because it can be changed into a prime (809698957) 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, 149249 + ... + 154578.

It is an arithmetic number, because the mean of its divisors is an integer number (66994074).

Almost surely, 2^809698955 is an apocalyptic number.

809698955 is a deficient number, since it is larger than the sum of its proper divisors (262206229).

809698955 is a wasteful number, since it uses less digits than its factorization.

809698955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303886.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The square root of 809698955 is about 28455.2096284670. The cubic root of 809698955 is about 932.0542539196.

The spelling of 809698955 in words is "eight hundred nine million, six hundred ninety-eight thousand, nine hundred fifty-five".