85921747 has 4 divisors (see below), whose sum is σ = 86358096. Its totient is φ = 85485400.

The previous prime is 85921741. The next prime is 85921753. The reversal of 85921747 is 74712958.

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

It is an interprime number because it is at equal distance from previous prime (85921741) and next prime (85921753).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85921747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85921741) 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, 217879 + ... + 218272.

It is an arithmetic number, because the mean of its divisors is an integer number (21589524).

Almost surely, 2^85921747 is an apocalyptic number.

85921747 is a deficient number, since it is larger than the sum of its proper divisors (436349).

85921747 is a wasteful number, since it uses less digits than its factorization.

85921747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436348.

The product of its digits is 141120, while the sum is 43.

The square root of 85921747 is about 9269.3984162943. The cubic root of 85921747 is about 441.2665761093.

It can be divided in two parts, 85921 and 747, that added together give a palindrome (86668).

The spelling of 85921747 in words is "eighty-five million, nine hundred twenty-one thousand, seven hundred forty-seven".