77968143 has 16 divisors (see below), whose sum is σ = 126009600. Its totient is φ = 47253240.

The previous prime is 77968133. The next prime is 77968147. The reversal of 77968143 is 34186977.

It is not a de Polignac number, because 77968143 - 2⁴ = 77968127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77968147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130963 + ... + 131556.

It is an arithmetic number, because the mean of its divisors is an integer number (7875600).

Almost surely, 2^77968143 is an apocalyptic number.

77968143 is a deficient number, since it is larger than the sum of its proper divisors (48041457).

77968143 is a wasteful number, since it uses less digits than its factorization.

77968143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262539 (or 262533 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 77968143 is about 8829.9571346638. The cubic root of 77968143 is about 427.2076918354.

The spelling of 77968143 in words is "seventy-seven million, nine hundred sixty-eight thousand, one hundred forty-three".