636033149 has 2 divisors, whose sum is σ = 636033150. Its totient is φ = 636033148.

The previous prime is 636033143. The next prime is 636033193. The reversal of 636033149 is 941330636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 524730649 + 111302500 = 22907^2 + 10550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636033149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636033143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318016574 + 318016575.

It is an arithmetic number, because the mean of its divisors is an integer number (318016575).

Almost surely, 2^636033149 is an apocalyptic number.

It is an amenable number.

636033149 is a deficient number, since it is larger than the sum of its proper divisors (1).

636033149 is an equidigital number, since it uses as much as digits as its factorization.

636033149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 636033149 is about 25219.6976389488. The cubic root of 636033149 is about 859.9897010665.

The spelling of 636033149 in words is "six hundred thirty-six million, thirty-three thousand, one hundred forty-nine".