85975649 has 4 divisors (see below), whose sum is σ = 86007300. Its totient is φ = 85944000.

The previous prime is 85975559. The next prime is 85975651. The reversal of 85975649 is 94657958.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42837025 + 43138624 = 6545^2 + 6568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85975649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85975649.

It is not an unprimeable number, because it can be changed into a prime (85975049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11324 + ... + 17325.

It is an arithmetic number, because the mean of its divisors is an integer number (21501825).

Almost surely, 2^85975649 is an apocalyptic number.

It is an amenable number.

85975649 is a deficient number, since it is larger than the sum of its proper divisors (31651).

85975649 is a wasteful number, since it uses less digits than its factorization.

85975649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31650.

The product of its digits is 2721600, while the sum is 53.

The square root of 85975649 is about 9272.3054846138. The cubic root of 85975649 is about 441.3588312902.

The spelling of 85975649 in words is "eighty-five million, nine hundred seventy-five thousand, six hundred forty-nine".