811435949 has 4 divisors (see below), whose sum is σ = 812791200. Its totient is φ = 810080700.

The previous prime is 811435927. The next prime is 811435951. The reversal of 811435949 is 949534118.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811435949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811435649) 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, 676727 + ... + 677924.

It is an arithmetic number, because the mean of its divisors is an integer number (203197800).

Almost surely, 2^811435949 is an apocalyptic number.

It is an amenable number.

811435949 is a deficient number, since it is larger than the sum of its proper divisors (1355251).

811435949 is a wasteful number, since it uses less digits than its factorization.

811435949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355250.

The product of its digits is 155520, while the sum is 44.

The square root of 811435949 is about 28485.7148233988. The cubic root of 811435949 is about 932.7202694893.

The spelling of 811435949 in words is "eight hundred eleven million, four hundred thirty-five thousand, nine hundred forty-nine".