3121730071 has 8 divisors (see below), whose sum is σ = 3209892224. Its totient is φ = 3033767520.

The previous prime is 3121730041. The next prime is 3121730081. The reversal of 3121730071 is 1700371213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121730071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121730021) 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, 17895 + ... + 81016.

It is an arithmetic number, because the mean of its divisors is an integer number (401236528).

Almost surely, 2^3121730071 is an apocalyptic number.

3121730071 is a deficient number, since it is larger than the sum of its proper divisors (88162153).

3121730071 is an equidigital number, since it uses as much as digits as its factorization.

3121730071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99801.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 3121730071 is about 55872.4446485027. Note that the first 3 decimals coincide. The cubic root of 3121730071 is about 1461.4987535193.

The spelling of 3121730071 in words is "three billion, one hundred twenty-one million, seven hundred thirty thousand, seventy-one".