133980247 has 8 divisors (see below), whose sum is σ = 142657200. Its totient is φ = 125391744.

The previous prime is 133980241. The next prime is 133980257. The reversal of 133980247 is 742089331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133980247 - 2²³ = 125591639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133980241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18972 + ... + 25057.

It is an arithmetic number, because the mean of its divisors is an integer number (17832150).

Almost surely, 2^133980247 is an apocalyptic number.

133980247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

133980247 is a deficient number, since it is larger than the sum of its proper divisors (8676953).

133980247 is a wasteful number, since it uses less digits than its factorization.

133980247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44225.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 133980247 is about 11574.9836716947. The cubic root of 133980247 is about 511.6978490170.

The spelling of 133980247 in words is "one hundred thirty-three million, nine hundred eighty thousand, two hundred forty-seven".