85143477 has 16 divisors (see below), whose sum is σ = 115949120. Its totient is φ = 55562112.

The previous prime is 85143469. The next prime is 85143491. The reversal of 85143477 is 77434158.

It is not a de Polignac number, because 85143477 - 2³ = 85143469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85143437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29043 + ... + 31839.

It is an arithmetic number, because the mean of its divisors is an integer number (7246820).

Almost surely, 2^85143477 is an apocalyptic number.

It is an amenable number.

85143477 is a deficient number, since it is larger than the sum of its proper divisors (30805643).

85143477 is a wasteful number, since it uses less digits than its factorization.

85143477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012.

The product of its digits is 94080, while the sum is 39.

The square root of 85143477 is about 9227.3223093160. The cubic root of 85143477 is about 439.9302179279.

The spelling of 85143477 in words is "eighty-five million, one hundred forty-three thousand, four hundred seventy-seven".