133146437 has 2 divisors, whose sum is σ = 133146438. Its totient is φ = 133146436.

The previous prime is 133146427. The next prime is 133146449. The reversal of 133146437 is 734641331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127260961 + 5885476 = 11281^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 133146437 - 2⁶ = 133146373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133146407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66573218 + 66573219.

It is an arithmetic number, because the mean of its divisors is an integer number (66573219).

Almost surely, 2^133146437 is an apocalyptic number.

It is an amenable number.

133146437 is a deficient number, since it is larger than the sum of its proper divisors (1).

133146437 is an equidigital number, since it uses as much as digits as its factorization.

133146437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 133146437 is about 11538.9096971941. The cubic root of 133146437 is about 510.6341426062.

Adding to 133146437 its reverse (734641331), we get a palindrome (867787768).

The spelling of 133146437 in words is "one hundred thirty-three million, one hundred forty-six thousand, four hundred thirty-seven".