85853731 has 2 divisors, whose sum is σ = 85853732. Its totient is φ = 85853730.

The previous prime is 85853711. The next prime is 85853749. The reversal of 85853731 is 13735858.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85853731 is a prime.

It is a super-2 number, since 2×85853731² = 14741726253240722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85853701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42926865 + 42926866.

It is an arithmetic number, because the mean of its divisors is an integer number (42926866).

Almost surely, 2^85853731 is an apocalyptic number.

85853731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85853731 is an equidigital number, since it uses as much as digits as its factorization.

85853731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 85853731 is about 9265.7288434316. The cubic root of 85853731 is about 441.1501092407.

The spelling of 85853731 in words is "eighty-five million, eight hundred fifty-three thousand, seven hundred thirty-one".