133246913 has 2 divisors, whose sum is σ = 133246914. Its totient is φ = 133246912.

The previous prime is 133246891. The next prime is 133246991. The reversal of 133246913 is 319642331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119946304 + 13300609 = 10952^2 + 3647^2 .

It is a cyclic number.

It is not a de Polignac number, because 133246913 - 2²⁶ = 66138049 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133246913.

It is not a weakly prime, because it can be changed into another prime (133246313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66623456 + 66623457.

It is an arithmetic number, because the mean of its divisors is an integer number (66623457).

Almost surely, 2^133246913 is an apocalyptic number.

It is an amenable number.

133246913 is a deficient number, since it is larger than the sum of its proper divisors (1).

133246913 is an equidigital number, since it uses as much as digits as its factorization.

133246913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The square root of 133246913 is about 11543.2626670279. The cubic root of 133246913 is about 510.7625565463.

The spelling of 133246913 in words is "one hundred thirty-three million, two hundred forty-six thousand, nine hundred thirteen".