85971758 has 4 divisors (see below), whose sum is σ = 128957640. Its totient is φ = 42985878.

The previous prime is 85971727. The next prime is 85971797. The reversal of 85971758 is 85717958.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×85971758² = 14782286347221128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21492938 + ... + 21492941.

It is an arithmetic number, because the mean of its divisors is an integer number (32239410).

Almost surely, 2^85971758 is an apocalyptic number.

85971758 is a deficient number, since it is larger than the sum of its proper divisors (42985882).

85971758 is a wasteful number, since it uses less digits than its factorization.

85971758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42985881.

The product of its digits is 705600, while the sum is 50.

The square root of 85971758 is about 9272.0956638723. The cubic root of 85971758 is about 441.3521729975.

The spelling of 85971758 in words is "eighty-five million, nine hundred seventy-one thousand, seven hundred fifty-eight".