133261783 has 2 divisors, whose sum is σ = 133261784. Its totient is φ = 133261782.

The previous prime is 133261771. The next prime is 133261789. The reversal of 133261783 is 387162331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133261783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133261789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66630891 + 66630892.

It is an arithmetic number, because the mean of its divisors is an integer number (66630892).

Almost surely, 2^133261783 is an apocalyptic number.

133261783 is a deficient number, since it is larger than the sum of its proper divisors (1).

133261783 is an equidigital number, since it uses as much as digits as its factorization.

133261783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 133261783 is about 11543.9067477176. The cubic root of 133261783 is about 510.7815557524.

The spelling of 133261783 in words is "one hundred thirty-three million, two hundred sixty-one thousand, seven hundred eighty-three".