133431293 has 2 divisors, whose sum is σ = 133431294. Its totient is φ = 133431292.

The previous prime is 133431289. The next prime is 133431299. The reversal of 133431293 is 392134331.

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., 99640324 + 33790969 = 9982^2 + 5813^2 .

It is a cyclic number.

It is not a de Polignac number, because 133431293 - 2² = 133431289 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 (133431299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66715646 + 66715647.

It is an arithmetic number, because the mean of its divisors is an integer number (66715647).

Almost surely, 2^133431293 is an apocalyptic number.

It is an amenable number.

133431293 is a deficient number, since it is larger than the sum of its proper divisors (1).

133431293 is an equidigital number, since it uses as much as digits as its factorization.

133431293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 29.

The square root of 133431293 is about 11551.2463829666. The cubic root of 133431293 is about 510.9980366626.

The spelling of 133431293 in words is "one hundred thirty-three million, four hundred thirty-one thousand, two hundred ninety-three".