133420673 has 4 divisors (see below), whose sum is σ = 133494228. Its totient is φ = 133347120.

The previous prime is 133420669. The next prime is 133420699. The reversal of 133420673 is 376024331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376024331 = 461 ⋅815671.

It can be written as a sum of positive squares in 2 ways, for example, as 7711729 + 125708944 = 2777^2 + 11212^2 .

It is a cyclic number.

It is not a de Polignac number, because 133420673 - 2² = 133420669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133420073) 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, 33986 + ... + 37707.

It is an arithmetic number, because the mean of its divisors is an integer number (33373557).

Almost surely, 2^133420673 is an apocalyptic number.

It is an amenable number.

133420673 is a deficient number, since it is larger than the sum of its proper divisors (73555).

133420673 is an equidigital number, since it uses as much as digits as its factorization.

133420673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73554.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 133420673 is about 11550.7866831658. The cubic root of 133420673 is about 510.9844792653.

The spelling of 133420673 in words is "one hundred thirty-three million, four hundred twenty thousand, six hundred seventy-three".