813442775 has 12 divisors (see below), whose sum is σ = 1068003072. Its totient is φ = 612474240.

The previous prime is 813442757. The next prime is 813442813. The reversal of 813442775 is 577244318.

It is not a de Polignac number, because 813442775 - 2⁶ = 813442711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 956567 + ... + 957416.

It is an arithmetic number, because the mean of its divisors is an integer number (89000256).

Almost surely, 2^813442775 is an apocalyptic number.

813442775 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

813442775 is a deficient number, since it is larger than the sum of its proper divisors (254560297).

813442775 is a wasteful number, since it uses less digits than its factorization.

813442775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914010 (or 1914005 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 813442775 is about 28520.9182005068. The cubic root of 813442775 is about 933.4885643876.

The spelling of 813442775 in words is "eight hundred thirteen million, four hundred forty-two thousand, seven hundred seventy-five".