451654609 has 6 divisors (see below), whose sum is σ = 525394194. Its totient is φ = 387132480.

The previous prime is 451654607. The next prime is 451654649. The reversal of 451654609 is 906456154.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 241491600 + 210163009 = 15540^2 + 14497^2 .

It is not a de Polignac number, because 451654609 - 2¹ = 451654607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451654603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4608672 + ... + 4608769.

It is an arithmetic number, because the mean of its divisors is an integer number (87565699).

Almost surely, 2^451654609 is an apocalyptic number.

451654609 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

451654609 is a deficient number, since it is larger than the sum of its proper divisors (73739585).

451654609 is an equidigital number, since it uses as much as digits as its factorization.

451654609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217455 (or 9217448 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 451654609 is about 21252.1671600804. The cubic root of 451654609 is about 767.2475002558.

The spelling of 451654609 in words is "four hundred fifty-one million, six hundred fifty-four thousand, six hundred nine".