128087957 has 2 divisors, whose sum is σ = 128087958. Its totient is φ = 128087956.

The previous prime is 128087951. The next prime is 128088031. The reversal of 128087957 is 759780821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126472516 + 1615441 = 11246^2 + 1271^2 .

It is an emirp because it is prime and its reverse (759780821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128087957 - 2¹² = 128083861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128087951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64043978 + 64043979.

It is an arithmetic number, because the mean of its divisors is an integer number (64043979).

Almost surely, 2^128087957 is an apocalyptic number.

It is an amenable number.

128087957 is a deficient number, since it is larger than the sum of its proper divisors (1).

128087957 is an equidigital number, since it uses as much as digits as its factorization.

128087957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 128087957 is about 11317.5950183774. The cubic root of 128087957 is about 504.0838298557.

The spelling of 128087957 in words is "one hundred twenty-eight million, eighty-seven thousand, nine hundred fifty-seven".