133407331 has 2 divisors, whose sum is σ = 133407332. Its totient is φ = 133407330.

The previous prime is 133407289. The next prime is 133407343. The reversal of 133407331 is 133704331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133407331 - 2⁷ = 133407203 is a prime.

It is a super-4 number, since 4×133407331⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 133407296 and 133407305.

It is not a weakly prime, because it can be changed into another prime (133407361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66703665 + 66703666.

It is an arithmetic number, because the mean of its divisors is an integer number (66703666).

Almost surely, 2^133407331 is an apocalyptic number.

133407331 is a deficient number, since it is larger than the sum of its proper divisors (1).

133407331 is an equidigital number, since it uses as much as digits as its factorization.

133407331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 25.

The square root of 133407331 is about 11550.2091323058. The cubic root of 133407331 is about 510.9674459675.

The spelling of 133407331 in words is "one hundred thirty-three million, four hundred seven thousand, three hundred thirty-one".