128166937 has 2 divisors, whose sum is σ = 128166938. Its totient is φ = 128166936.

The previous prime is 128166919. The next prime is 128166953. The reversal of 128166937 is 739661821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126765081 + 1401856 = 11259^2 + 1184^2 .

It is an emirp because it is prime and its reverse (739661821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128166937 - 2¹⁵ = 128134169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128166893 and 128166902.

It is not a weakly prime, because it can be changed into another prime (128166967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64083468 + 64083469.

It is an arithmetic number, because the mean of its divisors is an integer number (64083469).

Almost surely, 2^128166937 is an apocalyptic number.

It is an amenable number.

128166937 is a deficient number, since it is larger than the sum of its proper divisors (1).

128166937 is an equidigital number, since it uses as much as digits as its factorization.

128166937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 128166937 is about 11321.0837378760. The cubic root of 128166937 is about 504.1874158647.

The spelling of 128166937 in words is "one hundred twenty-eight million, one hundred sixty-six thousand, nine hundred thirty-seven".