128247433 has 2 divisors, whose sum is σ = 128247434. Its totient is φ = 128247432.

The previous prime is 128247407. The next prime is 128247461. The reversal of 128247433 is 334742821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65092624 + 63154809 = 8068^2 + 7947^2 .

It is a cyclic number.

It is not a de Polignac number, because 128247433 - 2⁵ = 128247401 is a prime.

It is not a weakly prime, because it can be changed into another prime (128247233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64123716 + 64123717.

It is an arithmetic number, because the mean of its divisors is an integer number (64123717).

Almost surely, 2^128247433 is an apocalyptic number.

It is an amenable number.

128247433 is a deficient number, since it is larger than the sum of its proper divisors (1).

128247433 is an equidigital number, since it uses as much as digits as its factorization.

128247433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 34.

The square root of 128247433 is about 11324.6383165203. The cubic root of 128247433 is about 504.2929464006.

The spelling of 128247433 in words is "one hundred twenty-eight million, two hundred forty-seven thousand, four hundred thirty-three".