128537587 has 2 divisors, whose sum is σ = 128537588. Its totient is φ = 128537586.

The previous prime is 128537579. The next prime is 128537611. The reversal of 128537587 is 785735821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128537587 - 2³ = 128537579 is a prime.

It is a super-2 number, since 2×128537587² = 33043822543565138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128537987) 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, 64268793 + 64268794.

It is an arithmetic number, because the mean of its divisors is an integer number (64268794).

Almost surely, 2^128537587 is an apocalyptic number.

128537587 is a deficient number, since it is larger than the sum of its proper divisors (1).

128537587 is an equidigital number, since it uses as much as digits as its factorization.

128537587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 46.

The square root of 128537587 is about 11337.4418190348. The cubic root of 128537587 is about 504.6729732523.

The spelling of 128537587 in words is "one hundred twenty-eight million, five hundred thirty-seven thousand, five hundred eighty-seven".