133219391 has 2 divisors, whose sum is σ = 133219392. Its totient is φ = 133219390.

The previous prime is 133219363. The next prime is 133219409. The reversal of 133219391 is 193912331.

It is a strong prime.

It is an emirp because it is prime and its reverse (193912331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133219391 is a prime.

It is a super-2 number, since 2×133219391² = 35494812276821762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133219091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66609695 + 66609696.

It is an arithmetic number, because the mean of its divisors is an integer number (66609696).

Almost surely, 2^133219391 is an apocalyptic number.

133219391 is a deficient number, since it is larger than the sum of its proper divisors (1).

133219391 is an equidigital number, since it uses as much as digits as its factorization.

133219391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4374, while the sum is 32.

The square root of 133219391 is about 11542.0704815037. The cubic root of 133219391 is about 510.7273883144.

The spelling of 133219391 in words is "one hundred thirty-three million, two hundred nineteen thousand, three hundred ninety-one".