133123013 has 2 divisors, whose sum is σ = 133123014. Its totient is φ = 133123012.

The previous prime is 133123009. The next prime is 133123027. The reversal of 133123013 is 310321331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131629729 + 1493284 = 11473^2 + 1222^2 .

It is a cyclic number.

It is not a de Polignac number, because 133123013 - 2² = 133123009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133122982 and 133123000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133123033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66561506 + 66561507.

It is an arithmetic number, because the mean of its divisors is an integer number (66561507).

Almost surely, 2^133123013 is an apocalyptic number.

It is an amenable number.

133123013 is a deficient number, since it is larger than the sum of its proper divisors (1).

133123013 is an equidigital number, since it uses as much as digits as its factorization.

133123013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 133123013 is about 11537.8946519718. The cubic root of 133123013 is about 510.6041961404.

Adding to 133123013 its reverse (310321331), we get a palindrome (443444344).

The spelling of 133123013 in words is "one hundred thirty-three million, one hundred twenty-three thousand, thirteen".