408991453 has 18 divisors (see below), whose sum is σ = 452469822. Its totient is φ = 367501680.

The previous prime is 408991439. The next prime is 408991459. The reversal of 408991453 is 354199804.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 283147929 + 125843524 = 16827^2 + 11218^2 .

It is not a de Polignac number, because 408991453 - 2¹³ = 408983261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408991459) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5177068 + ... + 5177146.

Almost surely, 2^408991453 is an apocalyptic number.

It is an amenable number.

408991453 is a deficient number, since it is larger than the sum of its proper divisors (43478369).

408991453 is an frugal number, since it uses more digits than its factorization.

408991453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 408991453 is about 20223.5371040775. The cubic root of 408991453 is about 742.2862413762.

The spelling of 408991453 in words is "four hundred eight million, nine hundred ninety-one thousand, four hundred fifty-three".