188043949 has 2 divisors, whose sum is σ = 188043950. Its totient is φ = 188043948.

The previous prime is 188043941. The next prime is 188043959. The reversal of 188043949 is 949340881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167883849 + 20160100 = 12957^2 + 4490^2 .

It is an emirp because it is prime and its reverse (949340881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188043949 - 2³ = 188043941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188043899 and 188043908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188043941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94021974 + 94021975.

It is an arithmetic number, because the mean of its divisors is an integer number (94021975).

Almost surely, 2^188043949 is an apocalyptic number.

It is an amenable number.

188043949 is a deficient number, since it is larger than the sum of its proper divisors (1).

188043949 is an equidigital number, since it uses as much as digits as its factorization.

188043949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 188043949 is about 13712.9117622772. The cubic root of 188043949 is about 572.9100679479.

The spelling of 188043949 in words is "one hundred eighty-eight million, forty-three thousand, nine hundred forty-nine".