133406202613 has 4 divisors (see below), whose sum is σ = 133407379468. Its totient is φ = 133405025760.

The previous prime is 133406202569. The next prime is 133406202623. The reversal of 133406202613 is 316202604331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53442805329 + 79963397284 = 231177^2 + 282778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133406202613 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 (133406202623) 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, 397806 + ... + 651967.

It is an arithmetic number, because the mean of its divisors is an integer number (33351844867).

Almost surely, 2^133406202613 is an apocalyptic number.

It is an amenable number.

133406202613 is a deficient number, since it is larger than the sum of its proper divisors (1176855).

133406202613 is a wasteful number, since it uses less digits than its factorization.

133406202613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176854.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 133406202613 its reverse (316202604331), we get a palindrome (449608806944).

The spelling of 133406202613 in words is "one hundred thirty-three billion, four hundred six million, two hundred two thousand, six hundred thirteen".