85971757 has 4 divisors (see below), whose sum is σ = 88295356. Its totient is φ = 83648160.

The previous prime is 85971727. The next prime is 85971797. The reversal of 85971757 is 75717958.

85971757 is nontrivially palindromic in base 14.

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 73376356 + 12595401 = 8566^2 + 3549^2 .

It is a cyclic number.

It is not a de Polignac number, because 85971757 - 2¹⁵ = 85938989 is a prime.

It is a super-2 number, since 2×85971757² = 14782286003334098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85971757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85971707) 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, 1161744 + ... + 1161817.

It is an arithmetic number, because the mean of its divisors is an integer number (22073839).

Almost surely, 2^85971757 is an apocalyptic number.

It is an amenable number.

85971757 is a deficient number, since it is larger than the sum of its proper divisors (2323599).

85971757 is a wasteful number, since it uses less digits than its factorization.

85971757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323598.

The product of its digits is 617400, while the sum is 49.

The square root of 85971757 is about 9272.0956099471. The cubic root of 85971757 is about 441.3521712862.

The spelling of 85971757 in words is "eighty-five million, nine hundred seventy-one thousand, seven hundred fifty-seven".