814899671 has 4 divisors (see below), whose sum is σ = 828258744. Its totient is φ = 801540600.

The previous prime is 814899661. The next prime is 814899689. The reversal of 814899671 is 176998418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814899671 is a prime.

It is a super-2 number, since 2×814899671² = 1328122947591816482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814899601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6679445 + ... + 6679566.

It is an arithmetic number, because the mean of its divisors is an integer number (207064686).

Almost surely, 2^814899671 is an apocalyptic number.

814899671 is a deficient number, since it is larger than the sum of its proper divisors (13359073).

814899671 is a wasteful number, since it uses less digits than its factorization.

814899671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13359072.

The product of its digits is 870912, while the sum is 53.

The square root of 814899671 is about 28546.4476073644. The cubic root of 814899671 is about 934.0455323250.

The spelling of 814899671 in words is "eight hundred fourteen million, eight hundred ninety-nine thousand, six hundred seventy-one".