450847991 has 16 divisors (see below), whose sum is σ = 504396288. Its totient is φ = 399436800.

The previous prime is 450847961. The next prime is 450847993. The reversal of 450847991 is 199748054.

It is a cyclic number.

It is not a de Polignac number, because 450847991 - 2¹⁰ = 450846967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450847993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302450 + ... + 303936.

It is an arithmetic number, because the mean of its divisors is an integer number (31524768).

Almost surely, 2^450847991 is an apocalyptic number.

450847991 is a deficient number, since it is larger than the sum of its proper divisors (53548297).

450847991 is a wasteful number, since it uses less digits than its factorization.

450847991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 450847991 is about 21233.1813678497. The cubic root of 450847991 is about 766.7904810955.

The spelling of 450847991 in words is "four hundred fifty million, eight hundred forty-seven thousand, nine hundred ninety-one".