85457447 has 2 divisors, whose sum is σ = 85457448. Its totient is φ = 85457446.

The previous prime is 85457423. The next prime is 85457507. The reversal of 85457447 is 74475458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85457447 - 2⁸ = 85457191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85457398 and 85457407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85457947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42728723 + 42728724.

It is an arithmetic number, because the mean of its divisors is an integer number (42728724).

Almost surely, 2^85457447 is an apocalyptic number.

85457447 is a deficient number, since it is larger than the sum of its proper divisors (1).

85457447 is an equidigital number, since it uses as much as digits as its factorization.

85457447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 627200, while the sum is 44.

The square root of 85457447 is about 9244.3197153712. The cubic root of 85457447 is about 440.4703080675.

The spelling of 85457447 in words is "eighty-five million, four hundred fifty-seven thousand, four hundred forty-seven".