133829987 has 2 divisors, whose sum is σ = 133829988. Its totient is φ = 133829986.

The previous prime is 133829963. The next prime is 133829989. The reversal of 133829987 is 789928331.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (789928331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133829987 is a prime.

Together with 133829989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133829989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66914993 + 66914994.

It is an arithmetic number, because the mean of its divisors is an integer number (66914994).

Almost surely, 2^133829987 is an apocalyptic number.

133829987 is a deficient number, since it is larger than the sum of its proper divisors (1).

133829987 is an equidigital number, since it uses as much as digits as its factorization.

133829987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 133829987 is about 11568.4911289243. The cubic root of 133829987 is about 511.5064862804.

The spelling of 133829987 in words is "one hundred thirty-three million, eight hundred twenty-nine thousand, nine hundred eighty-seven".