133508407 has 2 divisors, whose sum is σ = 133508408. Its totient is φ = 133508406.

The previous prime is 133508393. The next prime is 133508477. The reversal of 133508407 is 704805331.

It is a weak prime.

It is an emirp because it is prime and its reverse (704805331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133508407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133508477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66754203 + 66754204.

It is an arithmetic number, because the mean of its divisors is an integer number (66754204).

Almost surely, 2^133508407 is an apocalyptic number.

133508407 is a deficient number, since it is larger than the sum of its proper divisors (1).

133508407 is an equidigital number, since it uses as much as digits as its factorization.

133508407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 133508407 is about 11554.5838090344. The cubic root of 133508407 is about 511.0964581373.

The spelling of 133508407 in words is "one hundred thirty-three million, five hundred eight thousand, four hundred seven".