133399997 has 2 divisors, whose sum is σ = 133399998. Its totient is φ = 133399996.

The previous prime is 133399991. The next prime is 133400009. The reversal of 133399997 is 799993331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124121881 + 9278116 = 11141^2 + 3046^2 .

It is a cyclic number.

It is not a de Polignac number, because 133399997 - 2⁶ = 133399933 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 (133399991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66699998 + 66699999.

It is an arithmetic number, because the mean of its divisors is an integer number (66699999).

Almost surely, 2^133399997 is an apocalyptic number.

It is an amenable number.

133399997 is a deficient number, since it is larger than the sum of its proper divisors (1).

133399997 is an equidigital number, since it uses as much as digits as its factorization.

133399997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1240029, while the sum is 53.

The square root of 133399997 is about 11549.8916445134. The cubic root of 133399997 is about 510.9580824043.

The spelling of 133399997 in words is "one hundred thirty-three million, three hundred ninety-nine thousand, nine hundred ninety-seven".