133646957 has 2 divisors, whose sum is σ = 133646958. Its totient is φ = 133646956.

The previous prime is 133646917. The next prime is 133646987. The reversal of 133646957 is 759646331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133148521 + 498436 = 11539^2 + 706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133646957 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 (133646917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66823478 + 66823479.

It is an arithmetic number, because the mean of its divisors is an integer number (66823479).

Almost surely, 2^133646957 is an apocalyptic number.

It is an amenable number.

133646957 is a deficient number, since it is larger than the sum of its proper divisors (1).

133646957 is an equidigital number, since it uses as much as digits as its factorization.

133646957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 133646957 is about 11560.5777104780. The cubic root of 133646957 is about 511.2731959036.

The spelling of 133646957 in words is "one hundred thirty-three million, six hundred forty-six thousand, nine hundred fifty-seven".