193532989 has 4 divisors (see below), whose sum is σ = 208420156. Its totient is φ = 178645824.

The previous prime is 193532987. The next prime is 193533013. The reversal of 193532989 is 989235391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44448889 + 149084100 = 6667^2 + 12210^2 .

It is a cyclic number.

It is not a de Polignac number, because 193532989 - 2¹ = 193532987 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 (193532987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7443564 + ... + 7443589.

It is an arithmetic number, because the mean of its divisors is an integer number (52105039).

Almost surely, 2^193532989 is an apocalyptic number.

It is an amenable number.

193532989 is a deficient number, since it is larger than the sum of its proper divisors (14887167).

193532989 is a wasteful number, since it uses less digits than its factorization.

193532989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14887166.

The product of its digits is 524880, while the sum is 49.

The square root of 193532989 is about 13911.6134578272. The cubic root of 193532989 is about 578.4311436600.

The spelling of 193532989 in words is "one hundred ninety-three million, five hundred thirty-two thousand, nine hundred eighty-nine".