85291090 has 8 divisors (see below), whose sum is σ = 153523980. Its totient is φ = 34116432.

The previous prime is 85291081. The next prime is 85291097. The reversal of 85291090 is 9019258.

It can be written as a sum of positive squares in 2 ways, for example, as 80586529 + 4704561 = 8977^2 + 2169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (85291097) 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 in 3 ways as a sum of consecutive naturals, for example, 4264545 + ... + 4264564.

Almost surely, 2^85291090 is an apocalyptic number.

85291090 is a deficient number, since it is larger than the sum of its proper divisors (68232890).

85291090 is a wasteful number, since it uses less digits than its factorization.

85291090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529116.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 85291090 is about 9235.3175365008. The cubic root of 85291090 is about 440.1843063961.

The spelling of 85291090 in words is "eighty-five million, two hundred ninety-one thousand, ninety".