128698403 has 2 divisors, whose sum is σ = 128698404. Its totient is φ = 128698402.

The previous prime is 128698399. The next prime is 128698417. The reversal of 128698403 is 304896821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128698403 - 2² = 128698399 is a prime.

It is not a weakly prime, because it can be changed into another prime (128698903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64349201 + 64349202.

It is an arithmetic number, because the mean of its divisors is an integer number (64349202).

Almost surely, 2^128698403 is an apocalyptic number.

128698403 is a deficient number, since it is larger than the sum of its proper divisors (1).

128698403 is an equidigital number, since it uses as much as digits as its factorization.

128698403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 128698403 is about 11344.5318545985. The cubic root of 128698403 is about 504.8833544270.

The spelling of 128698403 in words is "one hundred twenty-eight million, six hundred ninety-eight thousand, four hundred three".