3903993 has 6 divisors (see below), whose sum is σ = 5639114. Its totient is φ = 2602656.

The previous prime is 3903973. The next prime is 3904001. The reversal of 3903993 is 3993093.

It can be written as a sum of positive squares in only one way, i.e., 2471184 + 1432809 = 1572^2 + 1197^2 .

It is not a de Polignac number, because 3903993 - 2⁶ = 3903929 is a prime.

It is a super-2 number, since 2×3903993² = 30482322688098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3903973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216880 + ... + 216897.

Almost surely, 2^3903993 is an apocalyptic number.

It is an amenable number.

3903993 is a deficient number, since it is larger than the sum of its proper divisors (1735121).

3903993 is a wasteful number, since it uses less digits than its factorization.

3903993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433783 (or 433780 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 36.

The square root of 3903993 is about 1975.8524742500. The cubic root of 3903993 is about 157.4597932138.

The spelling of 3903993 in words is "three million, nine hundred three thousand, nine hundred ninety-three".