3121993 has 8 divisors (see below), whose sum is σ = 3578688. Its totient is φ = 2667984.

The previous prime is 3121981. The next prime is 3122003. The reversal of 3121993 is 3991213.

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 3121993 - 2⁵ = 3121961 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121913) 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, 4230 + ... + 4912.

It is an arithmetic number, because the mean of its divisors is an integer number (447336).

Almost surely, 2^3121993 is an apocalyptic number.

It is an amenable number.

3121993 is a deficient number, since it is larger than the sum of its proper divisors (456695).

3121993 is an equidigital number, since it uses as much as digits as its factorization.

3121993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its digits is 1458, while the sum is 28.

The square root of 3121993 is about 1766.9162402332. The cubic root of 3121993 is about 146.1539784145.

It can be divided in two parts, 3121 and 993, that added together give a palindrome (4114).

The spelling of 3121993 in words is "three million, one hundred twenty-one thousand, nine hundred ninety-three".