811970 has 8 divisors (see below), whose sum is σ = 1461564. Its totient is φ = 324784.

The previous prime is 811961. The next prime is 811981. The reversal of 811970 is 79118.

It can be written as a sum of positive squares in 2 ways, for example, as 811801 + 169 = 901^2 + 13^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40589 + ... + 40608.

2⁸¹¹⁹⁷⁰ is an apocalyptic number.

811970 is a deficient number, since it is larger than the sum of its proper divisors (649594).

811970 is a wasteful number, since it uses less digits than its factorization.

811970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81204.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 811970 is about 901.0937798032. The cubic root of 811970 is about 93.2924849593.

The spelling of 811970 in words is "eight hundred eleven thousand, nine hundred seventy".