133766537 has 2 divisors, whose sum is σ = 133766538. Its totient is φ = 133766536.

The previous prime is 133766533. The next prime is 133766539. The reversal of 133766537 is 735667331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133079296 + 687241 = 11536^2 + 829^2 .

It is a cyclic number.

It is not a de Polignac number, because 133766537 - 2² = 133766533 is a prime.

Together with 133766539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133766494 and 133766503.

It is not a weakly prime, because it can be changed into another prime (133766533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66883268 + 66883269.

It is an arithmetic number, because the mean of its divisors is an integer number (66883269).

Almost surely, 2^133766537 is an apocalyptic number.

It is an amenable number.

133766537 is a deficient number, since it is larger than the sum of its proper divisors (1).

133766537 is an equidigital number, since it uses as much as digits as its factorization.

133766537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 41.

The square root of 133766537 is about 11565.7484409786. The cubic root of 133766537 is about 511.4256368941.

The spelling of 133766537 in words is "one hundred thirty-three million, seven hundred sixty-six thousand, five hundred thirty-seven".