133800979 has 4 divisors (see below), whose sum is σ = 144093376. Its totient is φ = 123508584.

The previous prime is 133800973. The next prime is 133801001. The reversal of 133800979 is 979008331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 979008331 = 7 ⋅139858333.

It is a cyclic number.

It is not a de Polignac number, because 133800979 - 2³ = 133800971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133800971) 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, 5146179 + ... + 5146204.

It is an arithmetic number, because the mean of its divisors is an integer number (36023344).

Almost surely, 2^133800979 is an apocalyptic number.

133800979 is a deficient number, since it is larger than the sum of its proper divisors (10292397).

133800979 is a wasteful number, since it uses less digits than its factorization.

133800979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10292396.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 133800979 is about 11567.2373106114. The cubic root of 133800979 is about 511.4695268200.

The spelling of 133800979 in words is "one hundred thirty-three million, eight hundred thousand, nine hundred seventy-nine".