3121443997 has 8 divisors (see below), whose sum is σ = 3610345536. Its totient is φ = 2643287712.

The previous prime is 3121443977. The next prime is 3121444019. The reversal of 3121443997 is 7993441213.

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 3121443997 - 2¹¹ = 3121441949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121443907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2685688 + ... + 2686849.

It is an arithmetic number, because the mean of its divisors is an integer number (451293192).

Almost surely, 2^3121443997 is an apocalyptic number.

It is an amenable number.

3121443997 is a deficient number, since it is larger than the sum of its proper divisors (488901539).

3121443997 is an equidigital number, since it uses as much as digits as its factorization.

3121443997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5372627.

The product of its digits is 163296, while the sum is 43.

The square root of 3121443997 is about 55869.8845264602. The cubic root of 3121443997 is about 1461.4541084500.

The spelling of 3121443997 in words is "three billion, one hundred twenty-one million, four hundred forty-three thousand, nine hundred ninety-seven".