128492339 has 2 divisors, whose sum is σ = 128492340. Its totient is φ = 128492338.

The previous prime is 128492333. The next prime is 128492461. The reversal of 128492339 is 933294821.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128492339 is a prime.

It is a super-3 number, since 3×128492339³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128492296 and 128492305.

It is not a weakly prime, because it can be changed into another prime (128492333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64246169 + 64246170.

It is an arithmetic number, because the mean of its divisors is an integer number (64246170).

Almost surely, 2^128492339 is an apocalyptic number.

128492339 is a deficient number, since it is larger than the sum of its proper divisors (1).

128492339 is an equidigital number, since it uses as much as digits as its factorization.

128492339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 128492339 is about 11335.4461314939. The cubic root of 128492339 is about 504.6137477156.

The spelling of 128492339 in words is "one hundred twenty-eight million, four hundred ninety-two thousand, three hundred thirty-nine".