85579957 has 4 divisors (see below), whose sum is σ = 88531020. Its totient is φ = 82628896.

The previous prime is 85579943. The next prime is 85579961. The reversal of 85579957 is 75997558.

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 14447601 + 71132356 = 3801^2 + 8434^2 .

It is a cyclic number.

It is not a de Polignac number, because 85579957 - 2⁷ = 85579829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85579898 and 85579907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85570957) 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, 1475488 + ... + 1475545.

It is an arithmetic number, because the mean of its divisors is an integer number (22132755).

Almost surely, 2^85579957 is an apocalyptic number.

It is an amenable number.

85579957 is a deficient number, since it is larger than the sum of its proper divisors (2951063).

85579957 is a wasteful number, since it uses less digits than its factorization.

85579957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951062.

The product of its digits is 3969000, while the sum is 55.

The square root of 85579957 is about 9250.9435734956. The cubic root of 85579957 is about 440.6806905583.

The spelling of 85579957 in words is "eighty-five million, five hundred seventy-nine thousand, nine hundred fifty-seven".