128737069 has 2 divisors, whose sum is σ = 128737070. Its totient is φ = 128737068.

The previous prime is 128737009. The next prime is 128737087. The reversal of 128737069 is 960737821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107226025 + 21511044 = 10355^2 + 4638^2 .

It is a cyclic number.

It is not a de Polignac number, because 128737069 - 2²¹ = 126639917 is a prime.

It is a super-2 number, since 2×128737069² = 33146465869421522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128737009) 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, 64368534 + 64368535.

It is an arithmetic number, because the mean of its divisors is an integer number (64368535).

Almost surely, 2^128737069 is an apocalyptic number.

It is an amenable number.

128737069 is a deficient number, since it is larger than the sum of its proper divisors (1).

128737069 is an equidigital number, since it uses as much as digits as its factorization.

128737069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 128737069 is about 11346.2358956616. The cubic root of 128737069 is about 504.9339115554.

The spelling of 128737069 in words is "one hundred twenty-eight million, seven hundred thirty-seven thousand, sixty-nine".