455638409 has 4 divisors (see below), whose sum is σ = 457260180. Its totient is φ = 454016640.

The previous prime is 455638399. The next prime is 455638427. The reversal of 455638409 is 904836554.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 201554809 + 254083600 = 14197^2 + 15940^2 .

It is a cyclic number.

It is not a de Polignac number, because 455638409 - 2⁸ = 455638153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 455638409.

It is not an unprimeable number, because it can be changed into a prime (455638429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810464 + ... + 811025.

It is an arithmetic number, because the mean of its divisors is an integer number (114315045).

Almost surely, 2^455638409 is an apocalyptic number.

It is an amenable number.

455638409 is a deficient number, since it is larger than the sum of its proper divisors (1621771).

455638409 is a wasteful number, since it uses less digits than its factorization.

455638409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621770.

The product of its (nonzero) digits is 518400, while the sum is 44.

The square root of 455638409 is about 21345.6882999823. The cubic root of 455638409 is about 769.4967245947.

The spelling of 455638409 in words is "four hundred fifty-five million, six hundred thirty-eight thousand, four hundred nine".