811863002 has 4 divisors (see below), whose sum is σ = 1217794506. Its totient is φ = 405931500.

The previous prime is 811863001. The next prime is 811863113. The reversal of 811863002 is 200368118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 807071281 + 4791721 = 28409^2 + 2189^2 .

It is not an unprimeable number, because it can be changed into a prime (811863001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202965749 + ... + 202965752.

Almost surely, 2^811863002 is an apocalyptic number.

811863002 is a deficient number, since it is larger than the sum of its proper divisors (405931504).

811863002 is a wasteful number, since it uses less digits than its factorization.

811863002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405931503.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 811863002 is about 28493.2097525007. The cubic root of 811863002 is about 932.8838688189.

The spelling of 811863002 in words is "eight hundred eleven million, eight hundred sixty-three thousand, two".