189956519 has 2 divisors, whose sum is σ = 189956520. Its totient is φ = 189956518.

The previous prime is 189956497. The next prime is 189956531. The reversal of 189956519 is 915659981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189956519 is a prime.

It is a super-2 number, since 2×189956519² = 72166958221194722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189956579) 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 as a sum of consecutive naturals, namely, 94978259 + 94978260.

It is an arithmetic number, because the mean of its divisors is an integer number (94978260).

Almost surely, 2^189956519 is an apocalyptic number.

189956519 is a deficient number, since it is larger than the sum of its proper divisors (1).

189956519 is an equidigital number, since it uses as much as digits as its factorization.

189956519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 874800, while the sum is 53.

The square root of 189956519 is about 13782.4714402026. The cubic root of 189956519 is about 574.8458505498.

The spelling of 189956519 in words is "one hundred eighty-nine million, nine hundred fifty-six thousand, five hundred nineteen".