7977143 has 2 divisors, whose sum is σ = 7977144. Its totient is φ = 7977142.

The previous prime is 7977139. The next prime is 7977149. The reversal of 7977143 is 3417797.

It is a weak prime.

It is an emirp because it is prime and its reverse (3417797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7977143 - 2² = 7977139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7977097 and 7977106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7977149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988571 + 3988572.

It is an arithmetic number, because the mean of its divisors is an integer number (3988572).

Almost surely, 2^7977143 is an apocalyptic number.

7977143 is a deficient number, since it is larger than the sum of its proper divisors (1).

7977143 is an equidigital number, since it uses as much as digits as its factorization.

7977143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37044, while the sum is 38.

The square root of 7977143 is about 2824.3836495774. The cubic root of 7977143 is about 199.8093433079.

The spelling of 7977143 in words is "seven million, nine hundred seventy-seven thousand, one hundred forty-three".