133099973 has 2 divisors, whose sum is σ = 133099974. Its totient is φ = 133099972.

The previous prime is 133099969. The next prime is 133100017. The reversal of 133099973 is 379990331.

It is a happy number.

It is an a-pointer prime, because the next prime (133100017) can be obtained adding 133099973 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 61748164 = 8447^2 + 7858^2 .

It is a cyclic number.

It is not a de Polignac number, because 133099973 - 2² = 133099969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133099943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66549986 + 66549987.

It is an arithmetic number, because the mean of its divisors is an integer number (66549987).

Almost surely, 2^133099973 is an apocalyptic number.

It is an amenable number.

133099973 is a deficient number, since it is larger than the sum of its proper divisors (1).

133099973 is an equidigital number, since it uses as much as digits as its factorization.

133099973 is an evil number, because the sum of its binary digits is even.

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

The square root of 133099973 is about 11536.8961597130. The cubic root of 133099973 is about 510.5747371732.

The spelling of 133099973 in words is "one hundred thirty-three million, ninety-nine thousand, nine hundred seventy-three".