85980647 has 4 divisors (see below), whose sum is σ = 89718960. Its totient is φ = 82242336.

The previous prime is 85980623. The next prime is 85980667. The reversal of 85980647 is 74608958.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74608958 = 2 ⋅37304479.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85980647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85980667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1869122 + ... + 1869167.

It is an arithmetic number, because the mean of its divisors is an integer number (22429740).

Almost surely, 2^85980647 is an apocalyptic number.

85980647 is a deficient number, since it is larger than the sum of its proper divisors (3738313).

85980647 is a wasteful number, since it uses less digits than its factorization.

85980647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738312.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 85980647 is about 9272.5749929564. The cubic root of 85980647 is about 441.3673835905.

The spelling of 85980647 in words is "eighty-five million, nine hundred eighty thousand, six hundred forty-seven".