189954943 has 2 divisors, whose sum is σ = 189954944. Its totient is φ = 189954942.

The previous prime is 189954937. The next prime is 189954971. The reversal of 189954943 is 349459981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189954943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189952943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94977471 + 94977472.

It is an arithmetic number, because the mean of its divisors is an integer number (94977472).

Almost surely, 2^189954943 is an apocalyptic number.

189954943 is a deficient number, since it is larger than the sum of its proper divisors (1).

189954943 is an equidigital number, since it uses as much as digits as its factorization.

189954943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 52.

The square root of 189954943 is about 13782.4142660130. The cubic root of 189954943 is about 574.8442607833.

The spelling of 189954943 in words is "one hundred eighty-nine million, nine hundred fifty-four thousand, nine hundred forty-three".