201712649 has 2 divisors, whose sum is σ = 201712650. Its totient is φ = 201712648.

The previous prime is 201712639. The next prime is 201712697. The reversal of 201712649 is 946217102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184960000 + 16752649 = 13600^2 + 4093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201712649 is a prime.

It is not a weakly prime, because it can be changed into another prime (201712619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100856324 + 100856325.

It is an arithmetic number, because the mean of its divisors is an integer number (100856325).

Almost surely, 2^201712649 is an apocalyptic number.

It is an amenable number.

201712649 is a deficient number, since it is larger than the sum of its proper divisors (1).

201712649 is an equidigital number, since it uses as much as digits as its factorization.

201712649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 201712649 is about 14202.5578330102. The cubic root of 201712649 is about 586.4680774052.

The spelling of 201712649 in words is "two hundred one million, seven hundred twelve thousand, six hundred forty-nine".