201606749 has 2 divisors, whose sum is σ = 201606750. Its totient is φ = 201606748.

The previous prime is 201606731. The next prime is 201606763. The reversal of 201606749 is 947606102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144120025 + 57486724 = 12005^2 + 7582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201606749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201606649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100803374 + 100803375.

It is an arithmetic number, because the mean of its divisors is an integer number (100803375).

Almost surely, 2^201606749 is an apocalyptic number.

It is an amenable number.

201606749 is a deficient number, since it is larger than the sum of its proper divisors (1).

201606749 is an equidigital number, since it uses as much as digits as its factorization.

201606749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 201606749 is about 14198.8291418694. The cubic root of 201606749 is about 586.3654266927.

The spelling of 201606749 in words is "two hundred one million, six hundred six thousand, seven hundred forty-nine".