451988497 has 4 divisors (see below), whose sum is σ = 452033460. Its totient is φ = 451943536.

The previous prime is 451988489. The next prime is 451988507. The reversal of 451988497 is 794889154.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 206094736 + 245893761 = 14356^2 + 15681^2 .

It is a cyclic number.

It is not a de Polignac number, because 451988497 - 2³ = 451988489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451988417) 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, 279 + ... + 30067.

It is an arithmetic number, because the mean of its divisors is an integer number (113008365).

Almost surely, 2^451988497 is an apocalyptic number.

It is an amenable number.

451988497 is a deficient number, since it is larger than the sum of its proper divisors (44963).

451988497 is a wasteful number, since it uses less digits than its factorization.

451988497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44962.

The product of its digits is 2903040, while the sum is 55.

The square root of 451988497 is about 21260.0210959444. The cubic root of 451988497 is about 767.4365175771.

The spelling of 451988497 in words is "four hundred fifty-one million, nine hundred eighty-eight thousand, four hundred ninety-seven".