188923789 has 2 divisors, whose sum is σ = 188923790. Its totient is φ = 188923788.

The previous prime is 188923769. The next prime is 188923799. The reversal of 188923789 is 987329881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188842564 + 81225 = 13742^2 + 285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188923789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188923759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94461894 + 94461895.

It is an arithmetic number, because the mean of its divisors is an integer number (94461895).

Almost surely, 2^188923789 is an apocalyptic number.

It is an amenable number.

188923789 is a deficient number, since it is larger than the sum of its proper divisors (1).

188923789 is an equidigital number, since it uses as much as digits as its factorization.

188923789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 188923789 is about 13744.9550381222. The cubic root of 188923789 is about 573.8022088010.

The spelling of 188923789 in words is "one hundred eighty-eight million, nine hundred twenty-three thousand, seven hundred eighty-nine".