133908893 has 2 divisors, whose sum is σ = 133908894. Its totient is φ = 133908892.

The previous prime is 133908851. The next prime is 133909001. The reversal of 133908893 is 398809331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126742564 + 7166329 = 11258^2 + 2677^2 .

It is an emirp because it is prime and its reverse (398809331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133908893 - 2¹⁰ = 133907869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133908293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66954446 + 66954447.

It is an arithmetic number, because the mean of its divisors is an integer number (66954447).

Almost surely, 2^133908893 is an apocalyptic number.

It is an amenable number.

133908893 is a deficient number, since it is larger than the sum of its proper divisors (1).

133908893 is an equidigital number, since it uses as much as digits as its factorization.

133908893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 133908893 is about 11571.9010106378. The cubic root of 133908893 is about 511.6069944004.

The spelling of 133908893 in words is "one hundred thirty-three million, nine hundred eight thousand, eight hundred ninety-three".