85534489 has 2 divisors, whose sum is σ = 85534490. Its totient is φ = 85534488.

The previous prime is 85534457. The next prime is 85534499. The reversal of 85534489 is 98443558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 40106889 = 6740^2 + 6333^2 .

It is a cyclic number.

It is not a de Polignac number, because 85534489 - 2⁵ = 85534457 is a prime.

It is a super-2 number, since 2×85534489² = 14632297616982242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85534499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42767244 + 42767245.

It is an arithmetic number, because the mean of its divisors is an integer number (42767245).

Almost surely, 2^85534489 is an apocalyptic number.

It is an amenable number.

85534489 is a deficient number, since it is larger than the sum of its proper divisors (1).

85534489 is an equidigital number, since it uses as much as digits as its factorization.

85534489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 46.

The square root of 85534489 is about 9248.4857679514. The cubic root of 85534489 is about 440.6026332660.

It can be divided in two parts, 855 and 34489, that added together give a square (35344 = 188²).

The spelling of 85534489 in words is "eighty-five million, five hundred thirty-four thousand, four hundred eighty-nine".