1978714893 has 8 divisors (see below), whose sum is σ = 2642209408. Its totient is φ = 1317181824.

The previous prime is 1978714883. The next prime is 1978714939. The reversal of 1978714893 is 3984178791.

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

It is not a de Polignac number, because 1978714893 - 2⁴ = 1978714877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978714883) 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, 488005 + ... + 492042.

It is an arithmetic number, because the mean of its divisors is an integer number (330276176).

Almost surely, 2^1978714893 is an apocalyptic number.

It is an amenable number.

1978714893 is a deficient number, since it is larger than the sum of its proper divisors (663494515).

1978714893 is an equidigital number, since it uses as much as digits as its factorization.

1978714893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980723.

The product of its digits is 3048192, while the sum is 57.

The square root of 1978714893 is about 44482.7482626692. The cubic root of 1978714893 is about 1255.4355071238.

The spelling of 1978714893 in words is "one billion, nine hundred seventy-eight million, seven hundred fourteen thousand, eight hundred ninety-three".