85897149 has 32 divisors (see below), whose sum is σ = 127217664. Its totient is φ = 51226560.

The previous prime is 85897121. The next prime is 85897169. The reversal of 85897149 is 94179858.

It is not a de Polignac number, because 85897149 - 2⁸ = 85896893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85897169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 185292 + ... + 185754.

It is an arithmetic number, because the mean of its divisors is an integer number (3975552).

Almost surely, 2^85897149 is an apocalyptic number.

It is an amenable number.

85897149 is a deficient number, since it is larger than the sum of its proper divisors (41320515).

85897149 is a wasteful number, since it uses less digits than its factorization.

85897149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its digits is 725760, while the sum is 51.

The square root of 85897149 is about 9268.0714822448. The cubic root of 85897149 is about 441.2244629401.

The spelling of 85897149 in words is "eighty-five million, eight hundred ninety-seven thousand, one hundred forty-nine".