133049881 has 2 divisors, whose sum is σ = 133049882. Its totient is φ = 133049880.

The previous prime is 133049831. The next prime is 133049909. The reversal of 133049881 is 188940331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69305625 + 63744256 = 8325^2 + 7984^2 .

It is a cyclic number.

It is not a de Polignac number, because 133049881 - 2⁹ = 133049369 is a prime.

It is a super-2 number, since 2×133049881² = 35404541668228322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 133049881.

It is not a weakly prime, because it can be changed into another prime (133049831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66524940 + 66524941.

It is an arithmetic number, because the mean of its divisors is an integer number (66524941).

Almost surely, 2^133049881 is an apocalyptic number.

It is an amenable number.

133049881 is a deficient number, since it is larger than the sum of its proper divisors (1).

133049881 is an equidigital number, since it uses as much as digits as its factorization.

133049881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 133049881 is about 11534.7250075587. The cubic root of 133049881 is about 510.5106777591.

The spelling of 133049881 in words is "one hundred thirty-three million, forty-nine thousand, eight hundred eighty-one".