133641653 has 4 divisors (see below), whose sum is σ = 135019500. Its totient is φ = 132263808.

The previous prime is 133641647. The next prime is 133641659. The reversal of 133641653 is 356146331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 356146331 = 8737 ⋅40763.

It is an interprime number because it is at equal distance from previous prime (133641647) and next prime (133641659).

It can be written as a sum of positive squares in 2 ways, for example, as 62694724 + 70946929 = 7918^2 + 8423^2 .

It is a cyclic number.

It is not a de Polignac number, because 133641653 - 2⁸ = 133641397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133641659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688778 + ... + 688971.

It is an arithmetic number, because the mean of its divisors is an integer number (33754875).

Almost surely, 2^133641653 is an apocalyptic number.

It is an amenable number.

133641653 is a deficient number, since it is larger than the sum of its proper divisors (1377847).

133641653 is an equidigital number, since it uses as much as digits as its factorization.

133641653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377846.

The product of its digits is 19440, while the sum is 32.

The square root of 133641653 is about 11560.3483079015. The cubic root of 133641653 is about 511.2664322407.

Adding to 133641653 its reverse (356146331), we get a palindrome (489787984).

The spelling of 133641653 in words is "one hundred thirty-three million, six hundred forty-one thousand, six hundred fifty-three".