133431769 has 2 divisors, whose sum is σ = 133431770. Its totient is φ = 133431768.

The previous prime is 133431761. The next prime is 133431787. The reversal of 133431769 is 967134331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104142025 + 29289744 = 10205^2 + 5412^2 .

It is a cyclic number.

It is not a de Polignac number, because 133431769 - 2³ = 133431761 is a prime.

It is a super-2 number, since 2×133431769² = 35608073956938722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133431761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66715884 + 66715885.

It is an arithmetic number, because the mean of its divisors is an integer number (66715885).

Almost surely, 2^133431769 is an apocalyptic number.

It is an amenable number.

133431769 is a deficient number, since it is larger than the sum of its proper divisors (1).

133431769 is an equidigital number, since it uses as much as digits as its factorization.

133431769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 133431769 is about 11551.2669867855. The cubic root of 133431769 is about 510.9986443031.

The spelling of 133431769 in words is "one hundred thirty-three million, four hundred thirty-one thousand, seven hundred sixty-nine".