188249669 has 2 divisors, whose sum is σ = 188249670. Its totient is φ = 188249668.

The previous prime is 188249651. The next prime is 188249671. The reversal of 188249669 is 966942881.

It is a happy number.

188249669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187416100 + 833569 = 13690^2 + 913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188249669 is a prime.

It is a super-2 number, since 2×188249669² = 70875875757219122, which contains 22 as substring.

Together with 188249671, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188249669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188249609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94124834 + 94124835.

It is an arithmetic number, because the mean of its divisors is an integer number (94124835).

Almost surely, 2^188249669 is an apocalyptic number.

It is an amenable number.

188249669 is a deficient number, since it is larger than the sum of its proper divisors (1).

188249669 is an equidigital number, since it uses as much as digits as its factorization.

188249669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 188249669 is about 13720.4106716964. The cubic root of 188249669 is about 573.1189129310.

The spelling of 188249669 in words is "one hundred eighty-eight million, two hundred forty-nine thousand, six hundred sixty-nine".