133980397 has 2 divisors, whose sum is σ = 133980398. Its totient is φ = 133980396.

The previous prime is 133980373. The next prime is 133980523. The reversal of 133980397 is 793089331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128731716 + 5248681 = 11346^2 + 2291^2 .

It is a cyclic number.

It is not a de Polignac number, because 133980397 - 2²³ = 125591789 is a prime.

It is equal to p_7590886 and since 133980397 and 7590886 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133980317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66990198 + 66990199.

It is an arithmetic number, because the mean of its divisors is an integer number (66990199).

Almost surely, 2^133980397 is an apocalyptic number.

It is an amenable number.

133980397 is a deficient number, since it is larger than the sum of its proper divisors (1).

133980397 is an equidigital number, since it uses as much as digits as its factorization.

133980397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 133980397 is about 11574.9901511837. The cubic root of 133980397 is about 511.6980399771.

The spelling of 133980397 in words is "one hundred thirty-three million, nine hundred eighty thousand, three hundred ninety-seven".