2038661 has 2 divisors, whose sum is σ = 2038662. Its totient is φ = 2038660.

The previous prime is 2038639. The next prime is 2038693. The reversal of 2038661 is 1668302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 988036 = 1025^2 + 994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2038661 is a prime.

It is a super-2 number, since 2×2038661² = 8312277345842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2038661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2032661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1019330 + 1019331.

It is an arithmetic number, because the mean of its divisors is an integer number (1019331).

2^2038661 is an apocalyptic number.

It is an amenable number.

2038661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2038661 is an equidigital number, since it uses as much as digits as its factorization.

2038661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2038661 is about 1427.8168650076. The cubic root of 2038661 is about 126.7987595536.

The spelling of 2038661 in words is "two million, thirty-eight thousand, six hundred sixty-one".