85569149 has 2 divisors, whose sum is σ = 85569150. Its totient is φ = 85569148.

The previous prime is 85569089. The next prime is 85569157. The reversal of 85569149 is 94196558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77757124 + 7812025 = 8818^2 + 2795^2 .

It is a cyclic number.

It is not a de Polignac number, because 85569149 - 2⁸ = 85568893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85565149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42784574 + 42784575.

It is an arithmetic number, because the mean of its divisors is an integer number (42784575).

Almost surely, 2^85569149 is an apocalyptic number.

It is an amenable number.

85569149 is a deficient number, since it is larger than the sum of its proper divisors (1).

85569149 is an equidigital number, since it uses as much as digits as its factorization.

85569149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 47.

The square root of 85569149 is about 9250.3593984234. The cubic root of 85569149 is about 440.6621384051.

The spelling of 85569149 in words is "eighty-five million, five hundred sixty-nine thousand, one hundred forty-nine".