885667891 has 2 divisors, whose sum is σ = 885667892. Its totient is φ = 885667890.

The previous prime is 885667847. The next prime is 885667903. The reversal of 885667891 is 198766588.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 885667891 - 2⁹ = 885667379 is a prime.

It is a super-2 number, since 2×885667891² = 1568815226296775762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (885667091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442833945 + 442833946.

It is an arithmetic number, because the mean of its divisors is an integer number (442833946).

Almost surely, 2^885667891 is an apocalyptic number.

885667891 is a deficient number, since it is larger than the sum of its proper divisors (1).

885667891 is an equidigital number, since it uses as much as digits as its factorization.

885667891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 58.

The square root of 885667891 is about 29760.1728993633. The cubic root of 885667891 is about 960.3369372124.

The spelling of 885667891 in words is "eight hundred eighty-five million, six hundred sixty-seven thousand, eight hundred ninety-one".