189425669 has 2 divisors, whose sum is σ = 189425670. Its totient is φ = 189425668.

The previous prime is 189425659. The next prime is 189425689. The reversal of 189425669 is 966524981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142324900 + 47100769 = 11930^2 + 6863^2 .

It is an emirp because it is prime and its reverse (966524981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189425669 - 2⁸ = 189425413 is a prime.

It is a super-2 number, since 2×189425669² = 71764168152195122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189425609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94712834 + 94712835.

It is an arithmetic number, because the mean of its divisors is an integer number (94712835).

Almost surely, 2^189425669 is an apocalyptic number.

It is an amenable number.

189425669 is a deficient number, since it is larger than the sum of its proper divisors (1).

189425669 is an equidigital number, since it uses as much as digits as its factorization.

189425669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 189425669 is about 13763.1998096373. The cubic root of 189425669 is about 574.3098653920.

The spelling of 189425669 in words is "one hundred eighty-nine million, four hundred twenty-five thousand, six hundred sixty-nine".