85470247 has 4 divisors (see below), whose sum is σ = 85490680. Its totient is φ = 85449816.

The previous prime is 85470241. The next prime is 85470251. The reversal of 85470247 is 74207458.

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

It is a cyclic number.

It is not a de Polignac number, because 85470247 - 2³ = 85470239 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 (85470241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1413 + ... + 13150.

It is an arithmetic number, because the mean of its divisors is an integer number (21372670).

Almost surely, 2^85470247 is an apocalyptic number.

85470247 is a deficient number, since it is larger than the sum of its proper divisors (20433).

85470247 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 85470247 = (44278075)₁₁.

85470247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20432.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 85470247 is about 9245.0120064822. The cubic root of 85470247 is about 440.4922984993.

The spelling of 85470247 in words is "eighty-five million, four hundred seventy thousand, two hundred forty-seven".