76985643 has 16 divisors (see below), whose sum is σ = 118172160. Its totient is φ = 43669056.

The previous prime is 76985603. The next prime is 76985647. The reversal of 76985643 is 34658967.

It is not a de Polignac number, because 76985643 - 2¹² = 76981547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76985592 and 76985601.

It is not an unprimeable number, because it can be changed into a prime (76985647) 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, 10503 + ... + 16256.

It is an arithmetic number, because the mean of its divisors is an integer number (7385760).

Almost surely, 2^76985643 is an apocalyptic number.

76985643 is a deficient number, since it is larger than the sum of its proper divisors (41186517).

76985643 is a wasteful number, since it uses less digits than its factorization.

76985643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26906.

The product of its digits is 1088640, while the sum is 48.

The square root of 76985643 is about 8774.1462832574. The cubic root of 76985643 is about 425.4056436192.

The spelling of 76985643 in words is "seventy-six million, nine hundred eighty-five thousand, six hundred forty-three".