133437449 has 2 divisors, whose sum is σ = 133437450. Its totient is φ = 133437448.

The previous prime is 133437443. The next prime is 133437461. The reversal of 133437449 is 944734331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97377424 + 36060025 = 9868^2 + 6005^2 .

It is a cyclic number.

It is not a de Polignac number, because 133437449 - 2¹⁶ = 133371913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133437443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66718724 + 66718725.

It is an arithmetic number, because the mean of its divisors is an integer number (66718725).

Almost surely, 2^133437449 is an apocalyptic number.

It is an amenable number.

133437449 is a deficient number, since it is larger than the sum of its proper divisors (1).

133437449 is an equidigital number, since it uses as much as digits as its factorization.

133437449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 133437449 is about 11551.5128446451. The cubic root of 133437449 is about 511.0058950279.

It can be divided in two parts, 1334 and 37449, that added together give a palindrome (38783).

The spelling of 133437449 in words is "one hundred thirty-three million, four hundred thirty-seven thousand, four hundred forty-nine".