2038721 has 2 divisors, whose sum is σ = 2038722. Its totient is φ = 2038720.

The previous prime is 2038717. The next prime is 2038747. The reversal of 2038721 is 1278302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290496 + 748225 = 1136^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 2038721 - 2² = 2038717 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2038021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1019360 + 1019361.

It is an arithmetic number, because the mean of its divisors is an integer number (1019361).

2^2038721 is an apocalyptic number.

It is an amenable number.

2038721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2038721 is an equidigital number, since it uses as much as digits as its factorization.

2038721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2038721 is about 1427.8378759509. The cubic root of 2038721 is about 126.8000034830.

The spelling of 2038721 in words is "two million, thirty-eight thousand, seven hundred twenty-one".