133190581 has 2 divisors, whose sum is σ = 133190582. Its totient is φ = 133190580.

The previous prime is 133190579. The next prime is 133190587. The reversal of 133190581 is 185091331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116100625 + 17089956 = 10775^2 + 4134^2 .

It is a cyclic number.

It is not a de Polignac number, because 133190581 - 2¹ = 133190579 is a prime.

It is a super-2 number, since 2×133190581² = 35479461734235122, which contains 22 as substring.

Together with 133190579, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133190587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66595290 + 66595291.

It is an arithmetic number, because the mean of its divisors is an integer number (66595291).

Almost surely, 2^133190581 is an apocalyptic number.

It is an amenable number.

133190581 is a deficient number, since it is larger than the sum of its proper divisors (1).

133190581 is an equidigital number, since it uses as much as digits as its factorization.

133190581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 133190581 is about 11540.8223710444. The cubic root of 133190581 is about 510.6905690576.

The spelling of 133190581 in words is "one hundred thirty-three million, one hundred ninety thousand, five hundred eighty-one".