133319993 has 2 divisors, whose sum is σ = 133319994. Its totient is φ = 133319992.

The previous prime is 133319951. The next prime is 133320049. The reversal of 133319993 is 399913331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131492089 + 1827904 = 11467^2 + 1352^2 .

It is a cyclic number.

It is not a de Polignac number, because 133319993 - 2⁶ = 133319929 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133319993.

It is not a weakly prime, because it can be changed into another prime (133310993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66659996 + 66659997.

It is an arithmetic number, because the mean of its divisors is an integer number (66659997).

Almost surely, 2^133319993 is an apocalyptic number.

It is an amenable number.

133319993 is a deficient number, since it is larger than the sum of its proper divisors (1).

133319993 is an equidigital number, since it uses as much as digits as its factorization.

133319993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 41.

The square root of 133319993 is about 11546.4277159648. The cubic root of 133319993 is about 510.8559163220.

The spelling of 133319993 in words is "one hundred thirty-three million, three hundred nineteen thousand, nine hundred ninety-three".