133123433 has 6 divisors (see below), whose sum is σ = 136451262. Its totient is φ = 129874880.

The previous prime is 133123429. The next prime is 133123531. The reversal of 133123433 is 334321331.

It can be written as a sum of positive squares in 3 ways, for example, as 9535744 + 123587689 = 3088^2 + 11117^2 .

It is not a de Polignac number, because 133123433 - 2² = 133123429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133123399 and 133123408.

It is not an unprimeable number, because it can be changed into a prime (133123033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37916 + ... + 41277.

It is an arithmetic number, because the mean of its divisors is an integer number (22741877).

Almost surely, 2^133123433 is an apocalyptic number.

It is an amenable number.

133123433 is a deficient number, since it is larger than the sum of its proper divisors (3327829).

133123433 is an frugal number, since it uses more digits than its factorization.

133123433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79275 (or 79234 counting only the distinct ones).

The product of its digits is 1944, while the sum is 23.

The square root of 133123433 is about 11537.9128528517. The cubic root of 133123433 is about 510.6047331213.

Adding to 133123433 its reverse (334321331), we get a palindrome (467444764).

The spelling of 133123433 in words is "one hundred thirty-three million, one hundred twenty-three thousand, four hundred thirty-three".