161433453 has 4 divisors (see below), whose sum is σ = 215244608. Its totient is φ = 107622300.

The previous prime is 161433439. The next prime is 161433457. The reversal of 161433453 is 354334161.

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, and also an emirpimes, since its reverse is a distinct semiprime: 354334161 = 3 ⋅118111387.

It is not a de Polignac number, because 161433453 - 2⁹ = 161432941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161433453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161433457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26905573 + ... + 26905578.

It is an arithmetic number, because the mean of its divisors is an integer number (53811152).

Almost surely, 2^161433453 is an apocalyptic number.

It is an amenable number.

161433453 is a deficient number, since it is larger than the sum of its proper divisors (53811155).

161433453 is an equidigital number, since it uses as much as digits as its factorization.

161433453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53811154.

The product of its digits is 12960, while the sum is 30.

The square root of 161433453 is about 12705.6465006705. The cubic root of 161433453 is about 544.4999515145.

The spelling of 161433453 in words is "one hundred sixty-one million, four hundred thirty-three thousand, four hundred fifty-three".