991450575 has 36 divisors (see below), whose sum is σ = 1789407048. Its totient is φ = 524721600.

The previous prime is 991450567. The next prime is 991450601. The reversal of 991450575 is 575054199.

It is not a de Polignac number, because 991450575 - 2³ = 991450567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 991450575.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 12657 + ... + 46293.

Almost surely, 2^991450575 is an apocalyptic number.

991450575 is a deficient number, since it is larger than the sum of its proper divisors (797956473).

991450575 is a wasteful number, since it uses less digits than its factorization.

991450575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33784 (or 33776 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The square root of 991450575 is about 31487.3081574148. The cubic root of 991450575 is about 997.1420314638.

The spelling of 991450575 in words is "nine hundred ninety-one million, four hundred fifty thousand, five hundred seventy-five".