451994369 has 4 divisors (see below), whose sum is σ = 452541744. Its totient is φ = 451446996.

The previous prime is 451994359. The next prime is 451994393. The reversal of 451994369 is 963499154.

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 451994369 - 2²⁰ = 450945793 is a prime.

It is a super-2 number, since 2×451994369² = 408597819215416322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (451994329) 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 3 ways as a sum of consecutive naturals, for example, 272447 + ... + 274100.

It is an arithmetic number, because the mean of its divisors is an integer number (113135436).

Almost surely, 2^451994369 is an apocalyptic number.

It is an amenable number.

451994369 is a deficient number, since it is larger than the sum of its proper divisors (547375).

451994369 is an equidigital number, since it uses as much as digits as its factorization.

451994369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547374.

The product of its digits is 1049760, while the sum is 50.

The square root of 451994369 is about 21260.1591950766. The cubic root of 451994369 is about 767.4398409417.

The spelling of 451994369 in words is "four hundred fifty-one million, nine hundred ninety-four thousand, three hundred sixty-nine".