201061657 has 2 divisors, whose sum is σ = 201061658. Its totient is φ = 201061656.

The previous prime is 201061649. The next prime is 201061661. The reversal of 201061657 is 756160102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127599616 + 73462041 = 11296^2 + 8571^2 .

It is a cyclic number.

It is not a de Polignac number, because 201061657 - 2³ = 201061649 is a prime.

It is not a weakly prime, because it can be changed into another prime (201061457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100530828 + 100530829.

It is an arithmetic number, because the mean of its divisors is an integer number (100530829).

Almost surely, 2^201061657 is an apocalyptic number.

It is an amenable number.

201061657 is a deficient number, since it is larger than the sum of its proper divisors (1).

201061657 is an equidigital number, since it uses as much as digits as its factorization.

201061657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 201061657 is about 14179.6211867595. The cubic root of 201061657 is about 585.8364900420.

The spelling of 201061657 in words is "two hundred one million, sixty-one thousand, six hundred fifty-seven".