189953851 has 2 divisors, whose sum is σ = 189953852. Its totient is φ = 189953850.

The previous prime is 189953809. The next prime is 189953879. The reversal of 189953851 is 158359981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189953851 - 2¹¹ = 189951803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189953795 and 189953804.

It is not a weakly prime, because it can be changed into another prime (189953891) 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 as a sum of consecutive naturals, namely, 94976925 + 94976926.

It is an arithmetic number, because the mean of its divisors is an integer number (94976926).

Almost surely, 2^189953851 is an apocalyptic number.

189953851 is a deficient number, since it is larger than the sum of its proper divisors (1).

189953851 is an equidigital number, since it uses as much as digits as its factorization.

189953851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 49.

The square root of 189953851 is about 13782.3746502553. The cubic root of 189953851 is about 574.8431592394.

The spelling of 189953851 in words is "one hundred eighty-nine million, nine hundred fifty-three thousand, eight hundred fifty-one".