85553491 has 4 divisors (see below), whose sum is σ = 89273232. Its totient is φ = 81833752.

The previous prime is 85553449. The next prime is 85553497. The reversal of 85553491 is 19435558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85553491 - 2²³ = 77164883 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85553497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859836 + ... + 1859881.

It is an arithmetic number, because the mean of its divisors is an integer number (22318308).

Almost surely, 2^85553491 is an apocalyptic number.

85553491 is a deficient number, since it is larger than the sum of its proper divisors (3719741).

85553491 is a wasteful number, since it uses less digits than its factorization.

85553491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719740.

The product of its digits is 108000, while the sum is 40.

The square root of 85553491 is about 9249.5130142078. The cubic root of 85553491 is about 440.6352583565.

It can be divided in two parts, 855534 and 91, that added together give a square (855625 = 925²).

The spelling of 85553491 in words is "eighty-five million, five hundred fifty-three thousand, four hundred ninety-one".