2001061957 has 2 divisors, whose sum is σ = 2001061958. Its totient is φ = 2001061956.

The previous prime is 2001061927. The next prime is 2001061961. The reversal of 2001061957 is 7591601002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1999967841 + 1094116 = 44721^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001061957 - 2²⁷ = 1866844229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001061927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000530978 + 1000530979.

It is an arithmetic number, because the mean of its divisors is an integer number (1000530979).

Almost surely, 2^2001061957 is an apocalyptic number.

It is an amenable number.

2001061957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001061957 is an equidigital number, since it uses as much as digits as its factorization.

2001061957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 2001061957 is about 44733.2310145377. The cubic root of 2001061957 is about 1260.1440074340.

Adding to 2001061957 its reverse (7591601002), we get a palindrome (9592662959).

The spelling of 2001061957 in words is "two billion, one million, sixty-one thousand, nine hundred fifty-seven".