168432553 has 4 divisors (see below), whose sum is σ = 168834960. Its totient is φ = 168030148.

The previous prime is 168432541. The next prime is 168432557. The reversal of 168432553 is 355234861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 168432553 - 2¹⁷ = 168301481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168432557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200575 + ... + 201412.

It is an arithmetic number, because the mean of its divisors is an integer number (42208740).

Almost surely, 2^168432553 is an apocalyptic number.

It is an amenable number.

168432553 is a deficient number, since it is larger than the sum of its proper divisors (402407).

168432553 is an equidigital number, since it uses as much as digits as its factorization.

168432553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402406.

The product of its digits is 86400, while the sum is 37.

The square root of 168432553 is about 12978.1567643483. The cubic root of 168432553 is about 552.2579932859.

The spelling of 168432553 in words is "one hundred sixty-eight million, four hundred thirty-two thousand, five hundred fifty-three".