189996511 has 2 divisors, whose sum is σ = 189996512. Its totient is φ = 189996510.

The previous prime is 189996509. The next prime is 189996529. The reversal of 189996511 is 115699981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189996511 - 2¹ = 189996509 is a prime.

Together with 189996509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189996011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94998255 + 94998256.

It is an arithmetic number, because the mean of its divisors is an integer number (94998256).

Almost surely, 2^189996511 is an apocalyptic number.

189996511 is a deficient number, since it is larger than the sum of its proper divisors (1).

189996511 is an equidigital number, since it uses as much as digits as its factorization.

189996511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 49.

The square root of 189996511 is about 13783.9221921774. The cubic root of 189996511 is about 574.8861889428.

The spelling of 189996511 in words is "one hundred eighty-nine million, nine hundred ninety-six thousand, five hundred eleven".