85377505 has 4 divisors (see below), whose sum is σ = 102453012. Its totient is φ = 68302000.

The previous prime is 85377437. The next prime is 85377527. The reversal of 85377505 is 50577358.

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 38427601 + 46949904 = 6199^2 + 6852^2 .

It is not a de Polignac number, because 85377505 - 2⁷ = 85377377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8537746 + ... + 8537755.

It is an arithmetic number, because the mean of its divisors is an integer number (25613253).

Almost surely, 2^85377505 is an apocalyptic number.

It is an amenable number.

85377505 is a deficient number, since it is larger than the sum of its proper divisors (17075507).

85377505 is a wasteful number, since it uses less digits than its factorization.

85377505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17075506.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 85377505 is about 9239.9948593059. The cubic root of 85377505 is about 440.3329178063.

The spelling of 85377505 in words is "eighty-five million, three hundred seventy-seven thousand, five hundred five".