133153613 has 4 divisors (see below), whose sum is σ = 135029088. Its totient is φ = 131278140.

The previous prime is 133153607. The next prime is 133153633. The reversal of 133153613 is 316351331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133153613 - 2⁴ = 133153597 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 (133153633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937631 + ... + 937772.

It is an arithmetic number, because the mean of its divisors is an integer number (33757272).

Almost surely, 2^133153613 is an apocalyptic number.

It is an amenable number.

133153613 is a deficient number, since it is larger than the sum of its proper divisors (1875475).

133153613 is an equidigital number, since it uses as much as digits as its factorization.

133153613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875474.

The product of its digits is 2430, while the sum is 26.

The square root of 133153613 is about 11539.2206409272. The cubic root of 133153613 is about 510.6433160768.

The spelling of 133153613 in words is "one hundred thirty-three million, one hundred fifty-three thousand, six hundred thirteen".