969163891 has 2 divisors, whose sum is σ = 969163892. Its totient is φ = 969163890.

The previous prime is 969163889. The next prime is 969163927. The reversal of 969163891 is 198361969.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 969163891 - 2¹ = 969163889 is a prime.

Together with 969163889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (969163991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484581945 + 484581946.

It is an arithmetic number, because the mean of its divisors is an integer number (484581946).

Almost surely, 2^969163891 is an apocalyptic number.

969163891 is a deficient number, since it is larger than the sum of its proper divisors (1).

969163891 is an equidigital number, since it uses as much as digits as its factorization.

969163891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 52.

The square root of 969163891 is about 31131.3971899753. The cubic root of 969163891 is about 989.6137972569.

The spelling of 969163891 in words is "nine hundred sixty-nine million, one hundred sixty-three thousand, eight hundred ninety-one".