85748681 has 2 divisors, whose sum is σ = 85748682. Its totient is φ = 85748680.

The previous prime is 85748651. The next prime is 85748699. The reversal of 85748681 is 18684758.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85729081 + 19600 = 9259^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85748681 is a prime.

It is a super-2 number, since 2×85748681² = 14705672586479522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85748651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42874340 + 42874341.

It is an arithmetic number, because the mean of its divisors is an integer number (42874341).

Almost surely, 2^85748681 is an apocalyptic number.

It is an amenable number.

85748681 is a deficient number, since it is larger than the sum of its proper divisors (1).

85748681 is an equidigital number, since it uses as much as digits as its factorization.

85748681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 47.

The square root of 85748681 is about 9260.0583691465. The cubic root of 85748681 is about 440.9701064504.

The spelling of 85748681 in words is "eighty-five million, seven hundred forty-eight thousand, six hundred eighty-one".