133647983 has 4 divisors (see below), whose sum is σ = 152740560. Its totient is φ = 114555408.

The previous prime is 133647973. The next prime is 133647989. The reversal of 133647983 is 389746331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133647983 - 2¹⁴ = 133631599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133647989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9546278 + ... + 9546291.

It is an arithmetic number, because the mean of its divisors is an integer number (38185140).

Almost surely, 2^133647983 is an apocalyptic number.

133647983 is a deficient number, since it is larger than the sum of its proper divisors (19092577).

133647983 is an equidigital number, since it uses as much as digits as its factorization.

133647983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19092576.

The product of its digits is 326592, while the sum is 44.

The square root of 133647983 is about 11560.6220853378. The cubic root of 133647983 is about 511.2745042385.

The spelling of 133647983 in words is "one hundred thirty-three million, six hundred forty-seven thousand, nine hundred eighty-three".