805328249 has 4 divisors (see below), whose sum is σ = 878539920. Its totient is φ = 732116580.

The previous prime is 805328239. The next prime is 805328309. The reversal of 805328249 is 942823508.

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 not a de Polignac number, because 805328249 - 2¹⁶ = 805262713 is a prime.

It is a super-4 number, since 4×805328249⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805328219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36605819 + ... + 36605840.

It is an arithmetic number, because the mean of its divisors is an integer number (219634980).

Almost surely, 2^805328249 is an apocalyptic number.

It is an amenable number.

805328249 is a deficient number, since it is larger than the sum of its proper divisors (73211671).

805328249 is a wasteful number, since it uses less digits than its factorization.

805328249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73211670.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 805328249 is about 28378.3059571920. The cubic root of 805328249 is about 930.3741697842.

The spelling of 805328249 in words is "eight hundred five million, three hundred twenty-eight thousand, two hundred forty-nine".