85249090 has 8 divisors (see below), whose sum is σ = 153448380. Its totient is φ = 34099632.

The previous prime is 85249079. The next prime is 85249093. The reversal of 85249090 is 9094258.

It can be written as a sum of positive squares in 2 ways, for example, as 70341769 + 14907321 = 8387^2 + 3861^2 .

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 (85249093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4262445 + ... + 4262464.

Almost surely, 2^85249090 is an apocalyptic number.

85249090 is a deficient number, since it is larger than the sum of its proper divisors (68199290).

85249090 is a wasteful number, since it uses less digits than its factorization.

85249090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524916.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 85249090 is about 9233.0433769153. The cubic root of 85249090 is about 440.1120410268.

The spelling of 85249090 in words is "eighty-five million, two hundred forty-nine thousand, ninety".