133718857 has 2 divisors, whose sum is σ = 133718858. Its totient is φ = 133718856.

The previous prime is 133718833. The next prime is 133718861. The reversal of 133718857 is 758817331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133194681 + 524176 = 11541^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 133718857 - 2⁷ = 133718729 is a prime.

It is not a weakly prime, because it can be changed into another prime (133718867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66859428 + 66859429.

It is an arithmetic number, because the mean of its divisors is an integer number (66859429).

Almost surely, 2^133718857 is an apocalyptic number.

It is an amenable number.

133718857 is a deficient number, since it is larger than the sum of its proper divisors (1).

133718857 is an equidigital number, since it uses as much as digits as its factorization.

133718857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 133718857 is about 11563.6869985312. The cubic root of 133718857 is about 511.3648651626.

The spelling of 133718857 in words is "one hundred thirty-three million, seven hundred eighteen thousand, eight hundred fifty-seven".