133732381 has 2 divisors, whose sum is σ = 133732382. Its totient is φ = 133732380.

The previous prime is 133732351. The next prime is 133732439. The reversal of 133732381 is 183237331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69572281 + 64160100 = 8341^2 + 8010^2 .

It is a cyclic number.

It is not a de Polignac number, because 133732381 - 2⁵ = 133732349 is a prime.

It is a super-2 number, since 2×133732381² = 35768699455858322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133732321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66866190 + 66866191.

It is an arithmetic number, because the mean of its divisors is an integer number (66866191).

Almost surely, 2^133732381 is an apocalyptic number.

It is an amenable number.

133732381 is a deficient number, since it is larger than the sum of its proper divisors (1).

133732381 is an equidigital number, since it uses as much as digits as its factorization.

133732381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 133732381 is about 11564.2717453370. The cubic root of 133732381 is about 511.3821039811.

The spelling of 133732381 in words is "one hundred thirty-three million, seven hundred thirty-two thousand, three hundred eighty-one".