128940341 has 2 divisors, whose sum is σ = 128940342. Its totient is φ = 128940340.

The previous prime is 128940319. The next prime is 128940349. The reversal of 128940341 is 143049821.

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., 119268241 + 9672100 = 10921^2 + 3110^2 .

It is an emirp because it is prime and its reverse (143049821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128940341 - 2¹⁴ = 128923957 is a prime.

It is a super-2 number, since 2×128940341² = 33251223074392562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128940298 and 128940307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128940349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64470170 + 64470171.

It is an arithmetic number, because the mean of its divisors is an integer number (64470171).

Almost surely, 2^128940341 is an apocalyptic number.

It is an amenable number.

128940341 is a deficient number, since it is larger than the sum of its proper divisors (1).

128940341 is an equidigital number, since it uses as much as digits as its factorization.

128940341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 128940341 is about 11355.1900468464. The cubic root of 128940341 is about 505.1995303419.

The spelling of 128940341 in words is "one hundred twenty-eight million, nine hundred forty thousand, three hundred forty-one".