811224949 has 4 divisors (see below), whose sum is σ = 813817036. Its totient is φ = 808632864.

The previous prime is 811224929. The next prime is 811224959. The reversal of 811224949 is 949422118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949422118 = 2 ⋅474711059.

It can be written as a sum of positive squares in 2 ways, for example, as 5062500 + 806162449 = 2250^2 + 28393^2 .

It is a cyclic number.

It is not a de Polignac number, because 811224949 - 2²⁹ = 274354037 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 (811224919) 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, 1295574 + ... + 1296199.

It is an arithmetic number, because the mean of its divisors is an integer number (203454259).

Almost surely, 2^811224949 is an apocalyptic number.

It is an amenable number.

811224949 is a deficient number, since it is larger than the sum of its proper divisors (2592087).

811224949 is a wasteful number, since it uses less digits than its factorization.

811224949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592086.

The product of its digits is 41472, while the sum is 40.

The square root of 811224949 is about 28482.0109718398. The cubic root of 811224949 is about 932.6394165117.

The spelling of 811224949 in words is "eight hundred eleven million, two hundred twenty-four thousand, nine hundred forty-nine".