85649649 has 4 divisors (see below), whose sum is σ = 114199536. Its totient is φ = 57099764.

The previous prime is 85649647. The next prime is 85649653. The reversal of 85649649 is 94694658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85649649 - 2¹ = 85649647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85649647) 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, 14274939 + ... + 14274944.

It is an arithmetic number, because the mean of its divisors is an integer number (28549884).

Almost surely, 2^85649649 is an apocalyptic number.

It is an amenable number.

85649649 is a deficient number, since it is larger than the sum of its proper divisors (28549887).

85649649 is a wasteful number, since it uses less digits than its factorization.

85649649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28549886.

The product of its digits is 1866240, while the sum is 51.

The square root of 85649649 is about 9254.7095578413. The cubic root of 85649649 is about 440.8002808097.

It can be divided in two parts, 856 and 49649, that added together give a palindrome (50505).

The spelling of 85649649 in words is "eighty-five million, six hundred forty-nine thousand, six hundred forty-nine".