133447847 has 12 divisors (see below), whose sum is σ = 145343016. Its totient is φ = 121800960.

The previous prime is 133447829. The next prime is 133447859. The reversal of 133447847 is 748744331.

It is not a de Polignac number, because 133447847 - 2¹⁶ = 133382311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133447547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121772 + ... + 122862.

It is an arithmetic number, because the mean of its divisors is an integer number (12111918).

Almost surely, 2^133447847 is an apocalyptic number.

133447847 is a deficient number, since it is larger than the sum of its proper divisors (11895169).

133447847 is an equidigital number, since it uses as much as digits as its factorization.

133447847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298 (or 1201 counting only the distinct ones).

The product of its digits is 225792, while the sum is 41.

The square root of 133447847 is about 11551.9629067964. The cubic root of 133447847 is about 511.0191679167.

The spelling of 133447847 in words is "one hundred thirty-three million, four hundred forty-seven thousand, eight hundred forty-seven".