85677481 has 4 divisors (see below), whose sum is σ = 86560852. Its totient is φ = 84794112.

The previous prime is 85677439. The next prime is 85677491. The reversal of 85677481 is 18477658.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53290000 + 32387481 = 7300^2 + 5691^2 .

It is a cyclic number.

It is not a de Polignac number, because 85677481 - 2⁷ = 85677353 is a prime.

It is a super-2 number, since 2×85677481² = 14681261501010722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85677421) 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, 441540 + ... + 441733.

It is an arithmetic number, because the mean of its divisors is an integer number (21640213).

Almost surely, 2^85677481 is an apocalyptic number.

It is an amenable number.

85677481 is a deficient number, since it is larger than the sum of its proper divisors (883371).

85677481 is an equidigital number, since it uses as much as digits as its factorization.

85677481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883370.

The product of its digits is 376320, while the sum is 46.

The square root of 85677481 is about 9256.2131025598. The cubic root of 85677481 is about 440.8480219074.

The spelling of 85677481 in words is "eighty-five million, six hundred seventy-seven thousand, four hundred eighty-one".