451790991 has 6 divisors (see below), whose sum is σ = 652587000. Its totient is φ = 301193988.

The previous prime is 451790947. The next prime is 451791017. The reversal of 451790991 is 199097154.

It is not a de Polignac number, because 451790991 - 2¹¹ = 451788943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451790291) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 25099491 + ... + 25099508.

It is an arithmetic number, because the mean of its divisors is an integer number (108764500).

Almost surely, 2^451790991 is an apocalyptic number.

451790991 is a deficient number, since it is larger than the sum of its proper divisors (200796009).

451790991 is a wasteful number, since it uses less digits than its factorization.

451790991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50199005 (or 50199002 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 451790991 is about 21255.3755788977. The cubic root of 451790991 is about 767.3247187143.

The spelling of 451790991 in words is "four hundred fifty-one million, seven hundred ninety thousand, nine hundred ninety-one".