133715969 has 2 divisors, whose sum is σ = 133715970. Its totient is φ = 133715968.

The previous prime is 133715941. The next prime is 133715971. The reversal of 133715969 is 969517331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 82369 = 11560^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 133715969 - 2²⁰ = 132667393 is a prime.

It is a super-2 number, since 2×133715969² = 35759920731217922, which contains 22 as substring.

Together with 133715971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133715069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66857984 + 66857985.

It is an arithmetic number, because the mean of its divisors is an integer number (66857985).

Almost surely, 2^133715969 is an apocalyptic number.

It is an amenable number.

133715969 is a deficient number, since it is larger than the sum of its proper divisors (1).

133715969 is an equidigital number, since it uses as much as digits as its factorization.

133715969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 44.

The square root of 133715969 is about 11563.5621241899. The cubic root of 133715969 is about 511.3611837263.

The spelling of 133715969 in words is "one hundred thirty-three million, seven hundred fifteen thousand, nine hundred sixty-nine".