133161437 has 2 divisors, whose sum is σ = 133161438. Its totient is φ = 133161436.

The previous prime is 133161403. The next prime is 133161451. The reversal of 133161437 is 734161331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81522841 + 51638596 = 9029^2 + 7186^2 .

It is a cyclic number.

It is not a de Polignac number, because 133161437 - 2¹⁴ = 133145053 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 (133161487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66580718 + 66580719.

It is an arithmetic number, because the mean of its divisors is an integer number (66580719).

Almost surely, 2^133161437 is an apocalyptic number.

It is an amenable number.

133161437 is a deficient number, since it is larger than the sum of its proper divisors (1).

133161437 is an equidigital number, since it uses as much as digits as its factorization.

133161437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 133161437 is about 11539.5596536436. The cubic root of 133161437 is about 510.6533175454.

The spelling of 133161437 in words is "one hundred thirty-three million, one hundred sixty-one thousand, four hundred thirty-seven".