189957505 has 8 divisors (see below), whose sum is σ = 228081600. Its totient is φ = 151877616.

The previous prime is 189957499. The next prime is 189957517. The reversal of 189957505 is 505759981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189957505 - 2⁷ = 189957377 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 715 + ... + 19504.

It is an arithmetic number, because the mean of its divisors is an integer number (28510200).

Almost surely, 2^189957505 is an apocalyptic number.

It is an amenable number.

189957505 is a deficient number, since it is larger than the sum of its proper divisors (38124095).

189957505 is a wasteful number, since it uses less digits than its factorization.

189957505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22103.

The product of its (nonzero) digits is 567000, while the sum is 49.

The square root of 189957505 is about 13782.5072102285. The cubic root of 189957505 is about 574.8468451582.

The spelling of 189957505 in words is "one hundred eighty-nine million, nine hundred fifty-seven thousand, five hundred five".