3121478494 has 16 divisors (see below), whose sum is σ = 5020401600. Its totient is φ = 1450335744.

The previous prime is 3121478491. The next prime is 3121478509. The reversal of 3121478494 is 4948741213.

It is a super-3 number, since 3×3121478494³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3121478494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121478491) 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, 578379 + ... + 583750.

It is an arithmetic number, because the mean of its divisors is an integer number (313775100).

Almost surely, 2^3121478494 is an apocalyptic number.

3121478494 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

3121478494 is a deficient number, since it is larger than the sum of its proper divisors (1898923106).

3121478494 is a wasteful number, since it uses less digits than its factorization.

3121478494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162227.

The product of its digits is 193536, while the sum is 43.

The square root of 3121478494 is about 55870.1932518584. The cubic root of 3121478494 is about 1461.4594922399.

The spelling of 3121478494 in words is "three billion, one hundred twenty-one million, four hundred seventy-eight thousand, four hundred ninety-four".