128732137 has 2 divisors, whose sum is σ = 128732138. Its totient is φ = 128732136.

The previous prime is 128732129. The next prime is 128732141. The reversal of 128732137 is 731237821.

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., 127486681 + 1245456 = 11291^2 + 1116^2 .

It is a cyclic number.

It is not a de Polignac number, because 128732137 - 2³ = 128732129 is a prime.

It is not a weakly prime, because it can be changed into another prime (128732437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64366068 + 64366069.

It is an arithmetic number, because the mean of its divisors is an integer number (64366069).

Almost surely, 2^128732137 is an apocalyptic number.

It is an amenable number.

128732137 is a deficient number, since it is larger than the sum of its proper divisors (1).

128732137 is an equidigital number, since it uses as much as digits as its factorization.

128732137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 128732137 is about 11346.0185527788. The cubic root of 128732137 is about 504.9274633586.

Adding to 128732137 its reverse (731237821), we get a palindrome (859969958).

The spelling of 128732137 in words is "one hundred twenty-eight million, seven hundred thirty-two thousand, one hundred thirty-seven".