128662957 has 2 divisors, whose sum is σ = 128662958. Its totient is φ = 128662956.

The previous prime is 128662951. The next prime is 128662967. The reversal of 128662957 is 759266821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128459556 + 203401 = 11334^2 + 451^2 .

It is a cyclic number.

It is not a de Polignac number, because 128662957 - 2¹⁹ = 128138669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128662951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331478 + 64331479.

It is an arithmetic number, because the mean of its divisors is an integer number (64331479).

Almost surely, 2^128662957 is an apocalyptic number.

It is an amenable number.

128662957 is a deficient number, since it is larger than the sum of its proper divisors (1).

128662957 is an equidigital number, since it uses as much as digits as its factorization.

128662957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 128662957 is about 11342.9694965648. The cubic root of 128662957 is about 504.8369986624.

The spelling of 128662957 in words is "one hundred twenty-eight million, six hundred sixty-two thousand, nine hundred fifty-seven".