133499389 has 2 divisors, whose sum is σ = 133499390. Its totient is φ = 133499388.

The previous prime is 133499371. The next prime is 133499413. The reversal of 133499389 is 983994331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128436889 + 5062500 = 11333^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 133499389 - 2⁵ = 133499357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133499369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66749694 + 66749695.

It is an arithmetic number, because the mean of its divisors is an integer number (66749695).

Almost surely, 2^133499389 is an apocalyptic number.

It is an amenable number.

133499389 is a deficient number, since it is larger than the sum of its proper divisors (1).

133499389 is an equidigital number, since it uses as much as digits as its factorization.

133499389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 49.

The square root of 133499389 is about 11554.1935677052. The cubic root of 133499389 is about 511.0849503186.

The spelling of 133499389 in words is "one hundred thirty-three million, four hundred ninety-nine thousand, three hundred eighty-nine".