128934829 has 2 divisors, whose sum is σ = 128934830. Its totient is φ = 128934828.

The previous prime is 128934821. The next prime is 128934833. The reversal of 128934829 is 928439821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114532804 + 14402025 = 10702^2 + 3795^2 .

It is a cyclic number.

It is not a de Polignac number, because 128934829 - 2³ = 128934821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128934821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64467414 + 64467415.

It is an arithmetic number, because the mean of its divisors is an integer number (64467415).

Almost surely, 2^128934829 is an apocalyptic number.

It is an amenable number.

128934829 is a deficient number, since it is larger than the sum of its proper divisors (1).

128934829 is an equidigital number, since it uses as much as digits as its factorization.

128934829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 128934829 is about 11354.9473358532. The cubic root of 128934829 is about 505.1923314067.

The spelling of 128934829 in words is "one hundred twenty-eight million, nine hundred thirty-four thousand, eight hundred twenty-nine".