133037537 has 8 divisors (see below), whose sum is σ = 134806056. Its totient is φ = 131277312.

The previous prime is 133037477. The next prime is 133037557. The reversal of 133037537 is 735730331.

It can be written as a sum of positive squares in 4 ways, for example, as 36192256 + 96845281 = 6016^2 + 9841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133037537 - 2¹² = 133033441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133037557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34343 + ... + 38019.

It is an arithmetic number, because the mean of its divisors is an integer number (16850757).

Almost surely, 2^133037537 is an apocalyptic number.

It is an amenable number.

133037537 is a deficient number, since it is larger than the sum of its proper divisors (1768519).

133037537 is an equidigital number, since it uses as much as digits as its factorization.

133037537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4147.

The product of its (nonzero) digits is 19845, while the sum is 32.

The square root of 133037537 is about 11534.1899152043. The cubic root of 133037537 is about 510.4948893479.

Adding to 133037537 its reverse (735730331), we get a palindrome (868767868).

The spelling of 133037537 in words is "one hundred thirty-three million, thirty-seven thousand, five hundred thirty-seven".