85827481 has 2 divisors, whose sum is σ = 85827482. Its totient is φ = 85827480.

The previous prime is 85827431. The next prime is 85827491. The reversal of 85827481 is 18472858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54523456 + 31304025 = 7384^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 85827481 - 2⁷ = 85827353 is a prime.

It is a super-2 number, since 2×85827481² = 14732712989610722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85827431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42913740 + 42913741.

It is an arithmetic number, because the mean of its divisors is an integer number (42913741).

Almost surely, 2^85827481 is an apocalyptic number.

It is an amenable number.

85827481 is a deficient number, since it is larger than the sum of its proper divisors (1).

85827481 is an equidigital number, since it uses as much as digits as its factorization.

85827481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 143360, while the sum is 43.

The square root of 85827481 is about 9264.3122248767. The cubic root of 85827481 is about 441.1051437292.

The spelling of 85827481 in words is "eighty-five million, eight hundred twenty-seven thousand, four hundred eighty-one".