133068921 has 4 divisors (see below), whose sum is σ = 177425232. Its totient is φ = 88712612.

The previous prime is 133068919. The next prime is 133068931. The reversal of 133068921 is 129860331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133068921 - 2¹ = 133068919 is a prime.

It is a super-2 number, since 2×133068921² = 35414675472208482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133068931) 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, 22178151 + ... + 22178156.

It is an arithmetic number, because the mean of its divisors is an integer number (44356308).

Almost surely, 2^133068921 is an apocalyptic number.

It is an amenable number.

133068921 is a deficient number, since it is larger than the sum of its proper divisors (44356311).

133068921 is an equidigital number, since it uses as much as digits as its factorization.

133068921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44356310.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 133068921 is about 11535.5503119704. The cubic root of 133068921 is about 510.5350286757.

The spelling of 133068921 in words is "one hundred thirty-three million, sixty-eight thousand, nine hundred twenty-one".