133430993 has 2 divisors, whose sum is σ = 133430994. Its totient is φ = 133430992.

The previous prime is 133430987. The next prime is 133431007. The reversal of 133430993 is 399034331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131974144 + 1456849 = 11488^2 + 1207^2 .

It is a cyclic number.

It is not a de Polignac number, because 133430993 - 2¹⁶ = 133365457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133430923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66715496 + 66715497.

It is an arithmetic number, because the mean of its divisors is an integer number (66715497).

Almost surely, 2^133430993 is an apocalyptic number.

It is an amenable number.

133430993 is a deficient number, since it is larger than the sum of its proper divisors (1).

133430993 is an equidigital number, since it uses as much as digits as its factorization.

133430993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 133430993 is about 11551.2333973477. The cubic root of 133430993 is about 510.9976536951.

The spelling of 133430993 in words is "one hundred thirty-three million, four hundred thirty thousand, nine hundred ninety-three".