174145989 has 4 divisors (see below), whose sum is σ = 232194656. Its totient is φ = 116097324.

The previous prime is 174145967. The next prime is 174145999. The reversal of 174145989 is 989541471.

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: 989541471 = 3 ⋅329847157.

It is not a de Polignac number, because 174145989 - 2¹⁷ = 174014917 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 (174145919) 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, 29024329 + ... + 29024334.

It is an arithmetic number, because the mean of its divisors is an integer number (58048664).

Almost surely, 2^174145989 is an apocalyptic number.

It is an amenable number.

174145989 is a deficient number, since it is larger than the sum of its proper divisors (58048667).

174145989 is an equidigital number, since it uses as much as digits as its factorization.

174145989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58048666.

The product of its digits is 362880, while the sum is 48.

The square root of 174145989 is about 13196.4384968066. The cubic root of 174145989 is about 558.4331082006.

The spelling of 174145989 in words is "one hundred seventy-four million, one hundred forty-five thousand, nine hundred eighty-nine".