133457689 has 2 divisors, whose sum is σ = 133457690. Its totient is φ = 133457688.

The previous prime is 133457683. The next prime is 133457713. The reversal of 133457689 is 986754331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96040000 + 37417689 = 9800^2 + 6117^2 .

It is a cyclic number.

It is not a de Polignac number, because 133457689 - 2⁷ = 133457561 is a prime.

It is not a weakly prime, because it can be changed into another prime (133457683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66728844 + 66728845.

It is an arithmetic number, because the mean of its divisors is an integer number (66728845).

Almost surely, 2^133457689 is an apocalyptic number.

It is an amenable number.

133457689 is a deficient number, since it is larger than the sum of its proper divisors (1).

133457689 is an equidigital number, since it uses as much as digits as its factorization.

133457689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 46.

The square root of 133457689 is about 11552.3888871523. The cubic root of 133457689 is about 511.0317304449.

The spelling of 133457689 in words is "one hundred thirty-three million, four hundred fifty-seven thousand, six hundred eighty-nine".