133646641 has 2 divisors, whose sum is σ = 133646642. Its totient is φ = 133646640.

The previous prime is 133646581. The next prime is 133646659. The reversal of 133646641 is 146646331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67305616 + 66341025 = 8204^2 + 8145^2 .

It is a cyclic number.

It is not a de Polignac number, because 133646641 - 2¹¹ = 133644593 is a prime.

It is a super-2 number, since 2×133646641² = 35722849301165762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 133646597 and 133646606.

It is not a weakly prime, because it can be changed into another prime (133646141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66823320 + 66823321.

It is an arithmetic number, because the mean of its divisors is an integer number (66823321).

Almost surely, 2^133646641 is an apocalyptic number.

It is an amenable number.

133646641 is a deficient number, since it is larger than the sum of its proper divisors (1).

133646641 is an equidigital number, since it uses as much as digits as its factorization.

133646641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 133646641 is about 11560.5640433328. The cubic root of 133646641 is about 511.2727929453.

The spelling of 133646641 in words is "one hundred thirty-three million, six hundred forty-six thousand, six hundred forty-one".