133742569 has 2 divisors, whose sum is σ = 133742570. Its totient is φ = 133742568.

The previous prime is 133742537. The next prime is 133742573. The reversal of 133742569 is 965247331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106337344 + 27405225 = 10312^2 + 5235^2 .

It is a cyclic number.

It is not a de Polignac number, because 133742569 - 2⁵ = 133742537 is a prime.

It is a super-2 number, since 2×133742569² = 35774149525439522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7578184 and since 133742569 and 7578184 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133742509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66871284 + 66871285.

It is an arithmetic number, because the mean of its divisors is an integer number (66871285).

Almost surely, 2^133742569 is an apocalyptic number.

It is an amenable number.

133742569 is a deficient number, since it is larger than the sum of its proper divisors (1).

133742569 is an equidigital number, since it uses as much as digits as its factorization.

133742569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 133742569 is about 11564.7122316122. The cubic root of 133742569 is about 511.3950896881.

The spelling of 133742569 in words is "one hundred thirty-three million, seven hundred forty-two thousand, five hundred sixty-nine".