805750989 has 8 divisors (see below), whose sum is σ = 1137530880. Its totient is φ = 505569216.

The previous prime is 805750963. The next prime is 805750991. The reversal of 805750989 is 989057508.

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

It is not a de Polignac number, because 805750989 - 2⁷ = 805750861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 15799039 = 805750989 / (8 + 0 + 5 + 7 + 5 + 0 + 9 + 8 + 9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805750189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7899469 + ... + 7899570.

It is an arithmetic number, because the mean of its divisors is an integer number (142191360).

Almost surely, 2^805750989 is an apocalyptic number.

It is an amenable number.

805750989 is a deficient number, since it is larger than the sum of its proper divisors (331779891).

805750989 is a wasteful number, since it uses less digits than its factorization.

805750989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15799059.

The product of its (nonzero) digits is 907200, while the sum is 51.

The square root of 805750989 is about 28385.7532751907. The cubic root of 805750989 is about 930.5369347097.

The spelling of 805750989 in words is "eight hundred five million, seven hundred fifty thousand, nine hundred eighty-nine".