85047247 has 2 divisors, whose sum is σ = 85047248. Its totient is φ = 85047246.

The previous prime is 85047199. The next prime is 85047251. The reversal of 85047247 is 74274058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85047247 - 2¹¹ = 85045199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85047257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42523623 + 42523624.

It is an arithmetic number, because the mean of its divisors is an integer number (42523624).

Almost surely, 2^85047247 is an apocalyptic number.

85047247 is a deficient number, since it is larger than the sum of its proper divisors (1).

85047247 is an equidigital number, since it uses as much as digits as its factorization.

85047247 is an evil number, because the sum of its binary digits is even.

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

The square root of 85047247 is about 9222.1064296613. The cubic root of 85047247 is about 439.7644176211.

It can be divided in two parts, 8504 and 7247, that added together give a palindrome (15751).

The spelling of 85047247 in words is "eighty-five million, forty-seven thousand, two hundred forty-seven".