133431367 has 2 divisors, whose sum is σ = 133431368. Its totient is φ = 133431366.

The previous prime is 133431307. The next prime is 133431373. The reversal of 133431367 is 763134331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133431367 - 2⁷ = 133431239 is a prime.

It is a super-3 number, since 3×133431367³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133431307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66715683 + 66715684.

It is an arithmetic number, because the mean of its divisors is an integer number (66715684).

Almost surely, 2^133431367 is an apocalyptic number.

133431367 is a deficient number, since it is larger than the sum of its proper divisors (1).

133431367 is an equidigital number, since it uses as much as digits as its factorization.

133431367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 31.

The square root of 133431367 is about 11551.2495860837. The cubic root of 133431367 is about 510.9981311278.

Adding to 133431367 its reverse (763134331), we get a palindrome (896565698).

The spelling of 133431367 in words is "one hundred thirty-three million, four hundred thirty-one thousand, three hundred sixty-seven".