133621847 has 2 divisors, whose sum is σ = 133621848. Its totient is φ = 133621846.

The previous prime is 133621801. The next prime is 133621849. The reversal of 133621847 is 748126331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133621847 - 2¹² = 133617751 is a prime.

Together with 133621849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133621849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66810923 + 66810924.

It is an arithmetic number, because the mean of its divisors is an integer number (66810924).

Almost surely, 2^133621847 is an apocalyptic number.

133621847 is a deficient number, since it is larger than the sum of its proper divisors (1).

133621847 is an equidigital number, since it uses as much as digits as its factorization.

133621847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 35.

The square root of 133621847 is about 11559.4916410714. The cubic root of 133621847 is about 511.2411740396.

The spelling of 133621847 in words is "one hundred thirty-three million, six hundred twenty-one thousand, eight hundred forty-seven".