133751249 has 2 divisors, whose sum is σ = 133751250. Its totient is φ = 133751248.

The previous prime is 133751227. The next prime is 133751297. The reversal of 133751249 is 942157331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 117649 = 11560^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 133751249 - 2⁸ = 133750993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133751749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66875624 + 66875625.

It is an arithmetic number, because the mean of its divisors is an integer number (66875625).

Almost surely, 2^133751249 is an apocalyptic number.

It is an amenable number.

133751249 is a deficient number, since it is larger than the sum of its proper divisors (1).

133751249 is an equidigital number, since it uses as much as digits as its factorization.

133751249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 133751249 is about 11565.0875050732. The cubic root of 133751249 is about 511.4061527660.

The spelling of 133751249 in words is "one hundred thirty-three million, seven hundred fifty-one thousand, two hundred forty-nine".