133209973 has 8 divisors (see below), whose sum is σ = 143555328. Its totient is φ = 122878704.

The previous prime is 133209959. The next prime is 133210013. The reversal of 133209973 is 379902331.

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

It is not a de Polignac number, because 133209973 - 2¹⁷ = 133078901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133209173) 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, 24336 + ... + 29302.

It is an arithmetic number, because the mean of its divisors is an integer number (17944416).

Almost surely, 2^133209973 is an apocalyptic number.

133209973 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133209973 is a deficient number, since it is larger than the sum of its proper divisors (10345355).

133209973 is a wasteful number, since it uses less digits than its factorization.

133209973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7043.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 133209973 is about 11541.6624885672. The cubic root of 133209973 is about 510.7153526693.

The spelling of 133209973 in words is "one hundred thirty-three million, two hundred nine thousand, nine hundred seventy-three".