189912563 has 8 divisors (see below), whose sum is σ = 193881600. Its totient is φ = 185968648.

The previous prime is 189912557. The next prime is 189912599. The reversal of 189912563 is 365219981.

It is a happy number.

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 189912563 - 2²² = 185718259 is a prime.

It is a super-3 number, since 3×189912563³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189912263) 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 7 ways as a sum of consecutive naturals, for example, 9398 + ... + 21636.

It is an arithmetic number, because the mean of its divisors is an integer number (24235200).

Almost surely, 2^189912563 is an apocalyptic number.

189912563 is a deficient number, since it is larger than the sum of its proper divisors (3969037).

189912563 is a wasteful number, since it uses less digits than its factorization.

189912563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12561.

The product of its digits is 116640, while the sum is 44.

The square root of 189912563 is about 13780.8767137653. The cubic root of 189912563 is about 574.8015072907.

The spelling of 189912563 in words is "one hundred eighty-nine million, nine hundred twelve thousand, five hundred sixty-three".