85377613 has 4 divisors (see below), whose sum is σ = 86777308. Its totient is φ = 83977920.

The previous prime is 85377601. The next prime is 85377667. The reversal of 85377613 is 31677358.

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 49533444 + 35844169 = 7038^2 + 5987^2 .

It is a cyclic number.

It is not a de Polignac number, because 85377613 - 2⁹ = 85377101 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 (85377683) 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, 699756 + ... + 699877.

It is an arithmetic number, because the mean of its divisors is an integer number (21694327).

Almost surely, 2^85377613 is an apocalyptic number.

It is an amenable number.

85377613 is a deficient number, since it is larger than the sum of its proper divisors (1399695).

85377613 is a wasteful number, since it uses less digits than its factorization.

85377613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399694.

The product of its digits is 105840, while the sum is 40.

The square root of 85377613 is about 9240.0007034632. Note that the first 3 decimals coincide. The cubic root of 85377613 is about 440.3331034755. Note that the first 3 decimals are identical.

The spelling of 85377613 in words is "eighty-five million, three hundred seventy-seven thousand, six hundred thirteen".