811949007 has 8 divisors (see below), whose sum is σ = 1083079984. Its totient is φ = 541058688.

The previous prime is 811948987. The next prime is 811949023. The reversal of 811949007 is 700949118.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 811949007 - 2¹² = 811944911 is a prime.

It is a super-2 number, since 2×811949007² = 1318522379936572098, 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 (811949057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52138 + ... + 65895.

It is an arithmetic number, because the mean of its divisors is an integer number (135384998).

Almost surely, 2^811949007 is an apocalyptic number.

811949007 is a deficient number, since it is larger than the sum of its proper divisors (271130977).

811949007 is a wasteful number, since it uses less digits than its factorization.

811949007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120329.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 811949007 is about 28494.7189317600. The cubic root of 811949007 is about 932.9168094522.

The spelling of 811949007 in words is "eight hundred eleven million, nine hundred forty-nine thousand, seven".