899849391 has 32 divisors (see below), whose sum is σ = 1389696000. Its totient is φ = 507306240.

The previous prime is 899849383. The next prime is 899849417. The reversal of 899849391 is 193948998.

It is a happy number.

It is not a de Polignac number, because 899849391 - 2³ = 899849383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899849341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 642510 + ... + 643908.

It is an arithmetic number, because the mean of its divisors is an integer number (43428000).

Almost surely, 2^899849391 is an apocalyptic number.

899849391 is a deficient number, since it is larger than the sum of its proper divisors (489846609).

899849391 is a wasteful number, since it uses less digits than its factorization.

899849391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its digits is 5038848, while the sum is 60.

The square root of 899849391 is about 29997.4897449770. The cubic root of 899849391 is about 965.4355255306.

The spelling of 899849391 in words is "eight hundred ninety-nine million, eight hundred forty-nine thousand, three hundred ninety-one".