85493729 has 2 divisors, whose sum is σ = 85493730. Its totient is φ = 85493728.

The previous prime is 85493719. The next prime is 85493741. The reversal of 85493729 is 92739458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 31618129 = 7340^2 + 5623^2 .

It is a cyclic number.

It is not a de Polignac number, because 85493729 - 2⁴ = 85493713 is a prime.

It is not a weakly prime, because it can be changed into another prime (85493719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42746864 + 42746865.

It is an arithmetic number, because the mean of its divisors is an integer number (42746865).

Almost surely, 2^85493729 is an apocalyptic number.

It is an amenable number.

85493729 is a deficient number, since it is larger than the sum of its proper divisors (1).

85493729 is an equidigital number, since it uses as much as digits as its factorization.

85493729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 85493729 is about 9246.2819013915. The cubic root of 85493729 is about 440.5326349259.

The spelling of 85493729 in words is "eighty-five million, four hundred ninety-three thousand, seven hundred twenty-nine".