133309997 has 2 divisors, whose sum is σ = 133309998. Its totient is φ = 133309996.

The previous prime is 133309993. The next prime is 133310003. The reversal of 133309997 is 799903331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84015556 + 49294441 = 9166^2 + 7021^2 .

It is a cyclic number.

It is not a de Polignac number, because 133309997 - 2² = 133309993 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 (133309991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66654998 + 66654999.

It is an arithmetic number, because the mean of its divisors is an integer number (66654999).

Almost surely, 2^133309997 is an apocalyptic number.

It is an amenable number.

133309997 is a deficient number, since it is larger than the sum of its proper divisors (1).

133309997 is an equidigital number, since it uses as much as digits as its factorization.

133309997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137781, while the sum is 44.

The square root of 133309997 is about 11545.9948466990. The cubic root of 133309997 is about 510.8431484361.

The spelling of 133309997 in words is "one hundred thirty-three million, three hundred nine thousand, nine hundred ninety-seven".