85470939247 has 4 divisors (see below), whose sum is σ = 85476664080. Its totient is φ = 85465214416.

The previous prime is 85470939221. The next prime is 85470939251. The reversal of 85470939247 is 74293907458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74293907458 = 2 ⋅37146953729.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85470939247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85470939191 and 85470939200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85470939847) 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, 2839963 + ... + 2869900.

It is an arithmetic number, because the mean of its divisors is an integer number (21369166020).

Almost surely, 2^85470939247 is an apocalyptic number.

85470939247 is a deficient number, since it is larger than the sum of its proper divisors (5724833).

85470939247 is a wasteful number, since it uses less digits than its factorization.

85470939247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724832.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 85470939247 in words is "eighty-five billion, four hundred seventy million, nine hundred thirty-nine thousand, two hundred forty-seven".