133388923 has 2 divisors, whose sum is σ = 133388924. Its totient is φ = 133388922.

The previous prime is 133388869. The next prime is 133388971. The reversal of 133388923 is 329883331.

It is a strong prime.

It is an emirp because it is prime and its reverse (329883331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133388923 is a prime.

It is not a weakly prime, because it can be changed into another prime (133388993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66694461 + 66694462.

It is an arithmetic number, because the mean of its divisors is an integer number (66694462).

Almost surely, 2^133388923 is an apocalyptic number.

133388923 is a deficient number, since it is larger than the sum of its proper divisors (1).

133388923 is an equidigital number, since it uses as much as digits as its factorization.

133388923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 133388923 is about 11549.4122361270. The cubic root of 133388923 is about 510.9439432076.

The spelling of 133388923 in words is "one hundred thirty-three million, three hundred eighty-eight thousand, nine hundred twenty-three".