128837899 has 2 divisors, whose sum is σ = 128837900. Its totient is φ = 128837898.

The previous prime is 128837873. The next prime is 128837903. The reversal of 128837899 is 998738821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128837899 - 2¹¹ = 128835851 is a prime.

It is not a weakly prime, because it can be changed into another prime (128837809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64418949 + 64418950.

It is an arithmetic number, because the mean of its divisors is an integer number (64418950).

Almost surely, 2^128837899 is an apocalyptic number.

128837899 is a deficient number, since it is larger than the sum of its proper divisors (1).

128837899 is an equidigital number, since it uses as much as digits as its factorization.

128837899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 55.

The square root of 128837899 is about 11350.6783497728. The cubic root of 128837899 is about 505.0657026562.

The spelling of 128837899 in words is "one hundred twenty-eight million, eight hundred thirty-seven thousand, eight hundred ninety-nine".