845690194 has 16 divisors (see below), whose sum is σ = 1346559768. Its totient is φ = 396963072.

The previous prime is 845690191. The next prime is 845690201. The reversal of 845690194 is 491096548.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 781482025 + 64208169 = 27955^2 + 8013^2 .

It is not an unprimeable number, because it can be changed into a prime (845690191) 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 7 ways as a sum of consecutive naturals, for example, 17829 + ... + 44824.

Almost surely, 2^845690194 is an apocalyptic number.

845690194 is a deficient number, since it is larger than the sum of its proper divisors (500869574).

845690194 is a wasteful number, since it uses less digits than its factorization.

845690194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63069.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 845690194 is about 29080.7529819982. The cubic root of 845690194 is about 945.6645266679.

The spelling of 845690194 in words is "eight hundred forty-five million, six hundred ninety thousand, one hundred ninety-four".