163453409 has 16 divisors (see below), whose sum is σ = 197114880. Its totient is φ = 132405840.

The previous prime is 163453403. The next prime is 163453417. The reversal of 163453409 is 904354361.

It is a happy number.

It is not a de Polignac number, because 163453409 - 2⁸ = 163453153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163453403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64052 + ... + 66554.

It is an arithmetic number, because the mean of its divisors is an integer number (12319680).

Almost surely, 2^163453409 is an apocalyptic number.

163453409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

163453409 is a deficient number, since it is larger than the sum of its proper divisors (33661471).

163453409 is a wasteful number, since it uses less digits than its factorization.

163453409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 163453409 is about 12784.8898704682. The cubic root of 163453409 is about 546.7615855324.

The spelling of 163453409 in words is "one hundred sixty-three million, four hundred fifty-three thousand, four hundred nine".