133113643 has 4 divisors (see below), whose sum is σ = 143353168. Its totient is φ = 122874120.

The previous prime is 133113619. The next prime is 133113647. The reversal of 133113643 is 346311331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346311331 = 2819 ⋅122849.

It is a cyclic number.

It is not a de Polignac number, because 133113643 - 2¹³ = 133105451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133113647) 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, 5119743 + ... + 5119768.

It is an arithmetic number, because the mean of its divisors is an integer number (35838292).

Almost surely, 2^133113643 is an apocalyptic number.

133113643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133113643 is a deficient number, since it is larger than the sum of its proper divisors (10239525).

133113643 is a wasteful number, since it uses less digits than its factorization.

133113643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10239524.

The product of its digits is 1944, while the sum is 25.

The square root of 133113643 is about 11537.4885915437. The cubic root of 133113643 is about 510.5922160591.

Adding to 133113643 its reverse (346311331), we get a palindrome (479424974).

The spelling of 133113643 in words is "one hundred thirty-three million, one hundred thirteen thousand, six hundred forty-three".