188272129 has 2 divisors, whose sum is σ = 188272130. Its totient is φ = 188272128.

The previous prime is 188272099. The next prime is 188272141. The reversal of 188272129 is 921272881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187553025 + 719104 = 13695^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 188272129 - 2⁷ = 188272001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188272091 and 188272100.

It is not a weakly prime, because it can be changed into another prime (188272199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94136064 + 94136065.

It is an arithmetic number, because the mean of its divisors is an integer number (94136065).

Almost surely, 2^188272129 is an apocalyptic number.

It is an amenable number.

188272129 is a deficient number, since it is larger than the sum of its proper divisors (1).

188272129 is an equidigital number, since it uses as much as digits as its factorization.

188272129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The square root of 188272129 is about 13721.2291359047. The cubic root of 188272129 is about 573.1417048947.

The spelling of 188272129 in words is "one hundred eighty-eight million, two hundred seventy-two thousand, one hundred twenty-nine".