133839889 has 2 divisors, whose sum is σ = 133839890. Its totient is φ = 133839888.

The previous prime is 133839883. The next prime is 133839943. The reversal of 133839889 is 988938331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116964225 + 16875664 = 10815^2 + 4108^2 .

It is a cyclic number.

It is not a de Polignac number, because 133839889 - 2¹⁹ = 133315601 is a prime.

It is not a weakly prime, because it can be changed into another prime (133839883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66919944 + 66919945.

It is an arithmetic number, because the mean of its divisors is an integer number (66919945).

Almost surely, 2^133839889 is an apocalyptic number.

It is an amenable number.

133839889 is a deficient number, since it is larger than the sum of its proper divisors (1).

133839889 is an equidigital number, since it uses as much as digits as its factorization.

133839889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 133839889 is about 11568.9190938480. The cubic root of 133839889 is about 511.5191013214.

The spelling of 133839889 in words is "one hundred thirty-three million, eight hundred thirty-nine thousand, eight hundred eighty-nine".