128358403 has 2 divisors, whose sum is σ = 128358404. Its totient is φ = 128358402.

The previous prime is 128358389. The next prime is 128358407. The reversal of 128358403 is 304853821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128358403 is a prime.

It is not a weakly prime, because it can be changed into another prime (128358407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64179201 + 64179202.

It is an arithmetic number, because the mean of its divisors is an integer number (64179202).

Almost surely, 2^128358403 is an apocalyptic number.

128358403 is a deficient number, since it is larger than the sum of its proper divisors (1).

128358403 is an equidigital number, since it uses as much as digits as its factorization.

128358403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 128358403 is about 11329.5367513416. The cubic root of 128358403 is about 504.4383560823.

The spelling of 128358403 in words is "one hundred twenty-eight million, three hundred fifty-eight thousand, four hundred three".