133885397 has 2 divisors, whose sum is σ = 133885398. Its totient is φ = 133885396.

The previous prime is 133885393. The next prime is 133885447. The reversal of 133885397 is 793588331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131928196 + 1957201 = 11486^2 + 1399^2 .

It is a cyclic number.

It is not a de Polignac number, because 133885397 - 2² = 133885393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133885393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66942698 + 66942699.

It is an arithmetic number, because the mean of its divisors is an integer number (66942699).

Almost surely, 2^133885397 is an apocalyptic number.

It is an amenable number.

133885397 is a deficient number, since it is larger than the sum of its proper divisors (1).

133885397 is an equidigital number, since it uses as much as digits as its factorization.

133885397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 133885397 is about 11570.8857482908. The cubic root of 133885397 is about 511.5770700222.

The spelling of 133885397 in words is "one hundred thirty-three million, eight hundred eighty-five thousand, three hundred ninety-seven".