8450991 has 24 divisors (see below), whose sum is σ = 13044720. Its totient is φ = 5256576.

The previous prime is 8450987. The next prime is 8451007. The reversal of 8450991 is 1990548.

It is not a de Polignac number, because 8450991 - 2² = 8450987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8450951) 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 23 ways as a sum of consecutive naturals, for example, 12145 + ... + 12821.

It is an arithmetic number, because the mean of its divisors is an integer number (543530).

Almost surely, 2^8450991 is an apocalyptic number.

8450991 is a deficient number, since it is larger than the sum of its proper divisors (4593729).

8450991 is a wasteful number, since it uses less digits than its factorization.

8450991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 8450991 is about 2907.0588229343. The cubic root of 8450991 is about 203.6897677857.

The spelling of 8450991 in words is "eight million, four hundred fifty thousand, nine hundred ninety-one".