811474949 has 4 divisors (see below), whose sum is σ = 811852620. Its totient is φ = 811097280.

The previous prime is 811474921. The next prime is 811474969. The reversal of 811474949 is 949474118.

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

It can be written as a sum of positive squares in 2 ways, for example, as 285001924 + 526473025 = 16882^2 + 22945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811474949 is a prime.

It is a super-4 number, since 4×811474949⁴ (a number of 37 digits) contains 4444 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 (811474969) 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, 185594 + ... + 189915.

It is an arithmetic number, because the mean of its divisors is an integer number (202963155).

Almost surely, 2^811474949 is an apocalyptic number.

It is an amenable number.

811474949 is a deficient number, since it is larger than the sum of its proper divisors (377671).

811474949 is a wasteful number, since it uses less digits than its factorization.

811474949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377670.

The product of its digits is 290304, while the sum is 47.

The square root of 811474949 is about 28486.3993688216. The cubic root of 811474949 is about 932.7352123437.

The spelling of 811474949 in words is "eight hundred eleven million, four hundred seventy-four thousand, nine hundred forty-nine".