813979011 has 8 divisors (see below), whose sum is σ = 1086566400. Its totient is φ = 542022152.

The previous prime is 813978961. The next prime is 813979037. The reversal of 813979011 is 110979318.

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

It is a cyclic number.

It is not a de Polignac number, because 813979011 - 2⁹ = 813978499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813979081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154611 + ... + 159788.

It is an arithmetic number, because the mean of its divisors is an integer number (135820800).

Almost surely, 2^813979011 is an apocalyptic number.

813979011 is a deficient number, since it is larger than the sum of its proper divisors (272587389).

813979011 is a wasteful number, since it uses less digits than its factorization.

813979011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315265.

The product of its (nonzero) digits is 13608, while the sum is 39.

The square root of 813979011 is about 28530.3174009684. The cubic root of 813979011 is about 933.6936434395.

The spelling of 813979011 in words is "eight hundred thirteen million, nine hundred seventy-nine thousand, eleven".