85811477 has 2 divisors, whose sum is σ = 85811478. Its totient is φ = 85811476.

The previous prime is 85811471. The next prime is 85811489. The reversal of 85811477 is 77411858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56640676 + 29170801 = 7526^2 + 5401^2 .

It is a cyclic number.

It is not a de Polignac number, because 85811477 - 2¹⁴ = 85795093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85811471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42905738 + 42905739.

It is an arithmetic number, because the mean of its divisors is an integer number (42905739).

Almost surely, 2^85811477 is an apocalyptic number.

It is an amenable number.

85811477 is a deficient number, since it is larger than the sum of its proper divisors (1).

85811477 is an equidigital number, since it uses as much as digits as its factorization.

85811477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62720, while the sum is 41.

The square root of 85811477 is about 9263.4484399709. The cubic root of 85811477 is about 441.0777248285.

The spelling of 85811477 in words is "eighty-five million, eight hundred eleven thousand, four hundred seventy-seven".