2009971 has 2 divisors, whose sum is σ = 2009972. Its totient is φ = 2009970.

The previous prime is 2009957. The next prime is 2009977. The reversal of 2009971 is 1799002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2009971 - 2¹⁵ = 1977203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2009977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004985 + 1004986.

It is an arithmetic number, because the mean of its divisors is an integer number (1004986).

2^2009971 is an apocalyptic number.

2009971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009971 is an equidigital number, since it uses as much as digits as its factorization.

2009971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 2009971 is about 1417.7344603275. The cubic root of 2009971 is about 126.2011358787.

The spelling of 2009971 in words is "two million, nine thousand, nine hundred seventy-one".