3117890643 has 8 divisors (see below), whose sum is σ = 4751071488. Its totient is φ = 1781651784.

The previous prime is 3117890639. The next prime is 3117890651. The reversal of 3117890643 is 3460987113.

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

It is not a de Polignac number, because 3117890643 - 2² = 3117890639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3117890595 and 3117890604.

It is not an unprimeable number, because it can be changed into a prime (3117890623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74235471 + ... + 74235512.

It is an arithmetic number, because the mean of its divisors is an integer number (593883936).

Almost surely, 2^3117890643 is an apocalyptic number.

3117890643 is a deficient number, since it is larger than the sum of its proper divisors (1633180845).

3117890643 is a wasteful number, since it uses less digits than its factorization.

3117890643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148470993.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 3117890643 is about 55838.0752085886. The cubic root of 3117890643 is about 1460.8993400378.

The spelling of 3117890643 in words is "three billion, one hundred seventeen million, eight hundred ninety thousand, six hundred forty-three".