811958099 has 4 divisors (see below), whose sum is σ = 812021064. Its totient is φ = 811895136.

The previous prime is 811958093. The next prime is 811958101. The reversal of 811958099 is 990859118.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 811958099 - 2⁴ = 811958083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811958093) 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 3 ways as a sum of consecutive naturals, for example, 4337 + ... + 40530.

It is an arithmetic number, because the mean of its divisors is an integer number (203005266).

Almost surely, 2^811958099 is an apocalyptic number.

811958099 is a deficient number, since it is larger than the sum of its proper divisors (62965).

811958099 is a wasteful number, since it uses less digits than its factorization.

811958099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62964.

The product of its (nonzero) digits is 233280, while the sum is 50.

The square root of 811958099 is about 28494.8784696478. The cubic root of 811958099 is about 932.9202916281.

The spelling of 811958099 in words is "eight hundred eleven million, nine hundred fifty-eight thousand, ninety-nine".