804690889 has 2 divisors, whose sum is σ = 804690890. Its totient is φ = 804690888.

The previous prime is 804690871. The next prime is 804690917. The reversal of 804690889 is 988096408.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609250489 + 195440400 = 24683^2 + 13980^2 .

It is a cyclic number.

It is not a de Polignac number, because 804690889 - 2⁹ = 804690377 is a prime.

It is a super-2 number, since 2×804690889² = 1295054853679220642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (804690829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402345444 + 402345445.

It is an arithmetic number, because the mean of its divisors is an integer number (402345445).

Almost surely, 2^804690889 is an apocalyptic number.

It is an amenable number.

804690889 is a deficient number, since it is larger than the sum of its proper divisors (1).

804690889 is an equidigital number, since it uses as much as digits as its factorization.

804690889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 804690889 is about 28367.0740295858. The cubic root of 804690889 is about 930.1286633566.

The spelling of 804690889 in words is "eight hundred four million, six hundred ninety thousand, eight hundred eighty-nine".