85474942247 has 2 divisors, whose sum is σ = 85474942248. Its totient is φ = 85474942246.

The previous prime is 85474942237. The next prime is 85474942253. The reversal of 85474942247 is 74224947458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85474942247 - 2³⁰ = 84401200423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85474942192 and 85474942201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85474942237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42737471123 + 42737471124.

It is an arithmetic number, because the mean of its divisors is an integer number (42737471124).

Almost surely, 2^85474942247 is an apocalyptic number.

85474942247 is a deficient number, since it is larger than the sum of its proper divisors (1).

85474942247 is an equidigital number, since it uses as much as digits as its factorization.

85474942247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18063360, while the sum is 56.

The spelling of 85474942247 in words is "eighty-five billion, four hundred seventy-four million, nine hundred forty-two thousand, two hundred forty-seven".