85691701 has 2 divisors, whose sum is σ = 85691702. Its totient is φ = 85691700.

The previous prime is 85691633. The next prime is 85691717. The reversal of 85691701 is 10719658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81468676 + 4223025 = 9026^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 85691701 - 2²¹ = 83594549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85691791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42845850 + 42845851.

It is an arithmetic number, because the mean of its divisors is an integer number (42845851).

Almost surely, 2^85691701 is an apocalyptic number.

It is an amenable number.

85691701 is a deficient number, since it is larger than the sum of its proper divisors (1).

85691701 is an equidigital number, since it uses as much as digits as its factorization.

85691701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 85691701 is about 9256.9812033945. The cubic root of 85691701 is about 440.8724099264.

The spelling of 85691701 in words is "eighty-five million, six hundred ninety-one thousand, seven hundred one".