133751797 has 2 divisors, whose sum is σ = 133751798. Its totient is φ = 133751796.

The previous prime is 133751791. The next prime is 133751861. The reversal of 133751797 is 797157331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71673156 + 62078641 = 8466^2 + 7879^2 .

It is a cyclic number.

It is not a de Polignac number, because 133751797 - 2³ = 133751789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133751791) 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, 66875898 + 66875899.

It is an arithmetic number, because the mean of its divisors is an integer number (66875899).

Almost surely, 2^133751797 is an apocalyptic number.

It is an amenable number.

133751797 is a deficient number, since it is larger than the sum of its proper divisors (1).

133751797 is an equidigital number, since it uses as much as digits as its factorization.

133751797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138915, while the sum is 43.

The square root of 133751797 is about 11565.1111970443. Note that the first 4 decimals coincide. The cubic root of 133751797 is about 511.4068512023.

The spelling of 133751797 in words is "one hundred thirty-three million, seven hundred fifty-one thousand, seven hundred ninety-seven".