800949389 has 4 divisors (see below), whose sum is σ = 843104640. Its totient is φ = 758794140.

The previous prime is 800949379. The next prime is 800949439. The reversal of 800949389 is 983949008.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800949389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800949349) 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 3 ways as a sum of consecutive naturals, for example, 21077597 + ... + 21077634.

It is an arithmetic number, because the mean of its divisors is an integer number (210776160).

Almost surely, 2^800949389 is an apocalyptic number.

It is an amenable number.

800949389 is a deficient number, since it is larger than the sum of its proper divisors (42155251).

800949389 is a wasteful number, since it uses less digits than its factorization.

800949389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42155250.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 800949389 is about 28301.0492561672. The cubic root of 800949389 is about 928.6848443345.

The spelling of 800949389 in words is "eight hundred million, nine hundred forty-nine thousand, three hundred eighty-nine".