2001346657 has 2 divisors, whose sum is σ = 2001346658. Its totient is φ = 2001346656.

The previous prime is 2001346631. The next prime is 2001346681. The reversal of 2001346657 is 7566431002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102306401 + 899040256 = 33201^2 + 29984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001346657 - 2²³ = 1992958049 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001346157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000673328 + 1000673329.

It is an arithmetic number, because the mean of its divisors is an integer number (1000673329).

Almost surely, 2^2001346657 is an apocalyptic number.

It is an amenable number.

2001346657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001346657 is an equidigital number, since it uses as much as digits as its factorization.

2001346657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 2001346657 is about 44736.4130993981. The cubic root of 2001346657 is about 1260.2037667008.

Adding to 2001346657 its reverse (7566431002), we get a palindrome (9567777659).

The spelling of 2001346657 in words is "two billion, one million, three hundred forty-six thousand, six hundred fifty-seven".