188078923 has 2 divisors, whose sum is σ = 188078924. Its totient is φ = 188078922.

The previous prime is 188078903. The next prime is 188078941. The reversal of 188078923 is 329870881.

It is a strong prime.

It is an emirp because it is prime and its reverse (329870881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188078923 - 2⁹ = 188078411 is a prime.

It is not a weakly prime, because it can be changed into another prime (188078903) 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, 94039461 + 94039462.

It is an arithmetic number, because the mean of its divisors is an integer number (94039462).

Almost surely, 2^188078923 is an apocalyptic number.

188078923 is a deficient number, since it is larger than the sum of its proper divisors (1).

188078923 is an equidigital number, since it uses as much as digits as its factorization.

188078923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 188078923 is about 13714.1869244954. The cubic root of 188078923 is about 572.9455839620.

It can be divided in two parts, 18807 and 8923, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 188078923 in words is "one hundred eighty-eight million, seventy-eight thousand, nine hundred twenty-three".