2001669937 has 2 divisors, whose sum is σ = 2001669938. Its totient is φ = 2001669936.

The previous prime is 2001669863. The next prime is 2001669953. The reversal of 2001669937 is 7399661002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1996213041 + 5456896 = 44679^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001669937 - 2⁷ = 2001669809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001669893 and 2001669902.

It is not a weakly prime, because it can be changed into another prime (2001669977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000834968 + 1000834969.

It is an arithmetic number, because the mean of its divisors is an integer number (1000834969).

Almost surely, 2^2001669937 is an apocalyptic number.

It is an amenable number.

2001669937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001669937 is an equidigital number, since it uses as much as digits as its factorization.

2001669937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 2001669937 is about 44740.0261175605. The cubic root of 2001669937 is about 1260.2716171385.

The spelling of 2001669937 in words is "two billion, one million, six hundred sixty-nine thousand, nine hundred thirty-seven".