3721393 has 8 divisors (see below), whose sum is σ = 4025448. Its totient is φ = 3419904.

The previous prime is 3721391. The next prime is 3721409. The reversal of 3721393 is 3931273.

It can be written as a sum of positive squares in 4 ways, for example, as 1682209 + 2039184 = 1297^2 + 1428^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3721393 - 2¹ = 3721391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3721391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3321 + ... + 4297.

It is an arithmetic number, because the mean of its divisors is an integer number (503181).

Almost surely, 2^3721393 is an apocalyptic number.

It is an amenable number.

3721393 is a deficient number, since it is larger than the sum of its proper divisors (304055).

3721393 is a wasteful number, since it uses less digits than its factorization.

3721393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283.

The product of its digits is 3402, while the sum is 28.

The square root of 3721393 is about 1929.0912368263. The cubic root of 3721393 is about 154.9655559954.

It can be divided in two parts, 3721 and 393, that added together give a palindrome (4114).

The spelling of 3721393 in words is "three million, seven hundred twenty-one thousand, three hundred ninety-three".