2938721 has 4 divisors (see below), whose sum is σ = 2976000. Its totient is φ = 2901444.

The previous prime is 2938717. The next prime is 2938729. The reversal of 2938721 is 1278392.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2938721 - 2² = 2938717 is a prime.

It is a super-2 number, since 2×2938721² = 17272162231682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2938729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18521 + ... + 18678.

It is an arithmetic number, because the mean of its divisors is an integer number (744000).

2^2938721 is an apocalyptic number.

It is an amenable number.

2938721 is a deficient number, since it is larger than the sum of its proper divisors (37279).

2938721 is an equidigital number, since it uses as much as digits as its factorization.

2938721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37278.

The product of its digits is 6048, while the sum is 32.

The square root of 2938721 is about 1714.2698154025. The cubic root of 2938721 is about 143.2361982343.

The spelling of 2938721 in words is "two million, nine hundred thirty-eight thousand, seven hundred twenty-one".