133457537 has 2 divisors, whose sum is σ = 133457538. Its totient is φ = 133457536.

The previous prime is 133457521. The next prime is 133457561. The reversal of 133457537 is 735754331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80982001 + 52475536 = 8999^2 + 7244^2 .

It is a cyclic number.

It is not a de Polignac number, because 133457537 - 2⁴ = 133457521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133457537.

It is not a weakly prime, because it can be changed into another prime (133487537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66728768 + 66728769.

It is an arithmetic number, because the mean of its divisors is an integer number (66728769).

Almost surely, 2^133457537 is an apocalyptic number.

It is an amenable number.

133457537 is a deficient number, since it is larger than the sum of its proper divisors (1).

133457537 is an equidigital number, since it uses as much as digits as its factorization.

133457537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 38.

The square root of 133457537 is about 11552.3823084245. The cubic root of 133457537 is about 511.0315364337.

The spelling of 133457537 in words is "one hundred thirty-three million, four hundred fifty-seven thousand, five hundred thirty-seven".