3143978 has 4 divisors (see below), whose sum is σ = 4715970. Its totient is φ = 1571988.

The previous prime is 3143969. The next prime is 3143993. The reversal of 3143978 is 8793413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8793413 = 157 ⋅56009.

It can be written as a sum of positive squares in only one way, i.e., 2866249 + 277729 = 1693^2 + 527^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 785993 + ... + 785996.

Almost surely, 2^3143978 is an apocalyptic number.

3143978 is a deficient number, since it is larger than the sum of its proper divisors (1571992).

3143978 is a wasteful number, since it uses less digits than its factorization.

3143978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571991.

The product of its digits is 18144, while the sum is 35.

The square root of 3143978 is about 1773.1266170243. The cubic root of 3143978 is about 146.4962471908.

The spelling of 3143978 in words is "three million, one hundred forty-three thousand, nine hundred seventy-eight".