91675889 has 2 divisors, whose sum is σ = 91675890. Its totient is φ = 91675888.

The previous prime is 91675853. The next prime is 91675967. The reversal of 91675889 is 98857619.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50523664 + 41152225 = 7108^2 + 6415^2 .

It is a cyclic number.

It is not a de Polignac number, because 91675889 - 2¹² = 91671793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91675889.

It is not a weakly prime, because it can be changed into another prime (91675189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45837944 + 45837945.

It is an arithmetic number, because the mean of its divisors is an integer number (45837945).

Almost surely, 2^91675889 is an apocalyptic number.

It is an amenable number.

91675889 is a deficient number, since it is larger than the sum of its proper divisors (1).

91675889 is an equidigital number, since it uses as much as digits as its factorization.

91675889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 53.

The square root of 91675889 is about 9574.7526861011. The cubic root of 91675889 is about 450.9049919256.

The spelling of 91675889 in words is "ninety-one million, six hundred seventy-five thousand, eight hundred eighty-nine".