189926459 has 4 divisors (see below), whose sum is σ = 191091816. Its totient is φ = 188761104.

The previous prime is 189926447. The next prime is 189926461. The reversal of 189926459 is 954629981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189926459 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 189926459.

It is not an unprimeable number, because it can be changed into a prime (189926059) 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, 582434 + ... + 582759.

It is an arithmetic number, because the mean of its divisors is an integer number (47772954).

Almost surely, 2^189926459 is an apocalyptic number.

189926459 is a deficient number, since it is larger than the sum of its proper divisors (1165357).

189926459 is a wasteful number, since it uses less digits than its factorization.

189926459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165356.

The product of its digits is 1399680, while the sum is 53.

The square root of 189926459 is about 13781.3808814647. The cubic root of 189926459 is about 574.8155264561.

The spelling of 189926459 in words is "one hundred eighty-nine million, nine hundred twenty-six thousand, four hundred fifty-nine".