128492293 has 2 divisors, whose sum is σ = 128492294. Its totient is φ = 128492292.

The previous prime is 128492279. The next prime is 128492327. The reversal of 128492293 is 392294821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86992929 + 41499364 = 9327^2 + 6442^2 .

It is a cyclic number.

It is not a de Polignac number, because 128492293 - 2¹³ = 128484101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128492233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64246146 + 64246147.

It is an arithmetic number, because the mean of its divisors is an integer number (64246147).

Almost surely, 2^128492293 is an apocalyptic number.

It is an amenable number.

128492293 is a deficient number, since it is larger than the sum of its proper divisors (1).

128492293 is an equidigital number, since it uses as much as digits as its factorization.

128492293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 128492293 is about 11335.4441024602. Note that the first 3 decimals coincide. The cubic root of 128492293 is about 504.6136874987.

The spelling of 128492293 in words is "one hundred twenty-eight million, four hundred ninety-two thousand, two hundred ninety-three".