689987789986 has 32 divisors (see below), whose sum is σ = 1197672754752. Its totient is φ = 294642216960.

The previous prime is 689987789983. The next prime is 689987789987.

689987789986 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 689987789894 and 689987789903.

It is not an unprimeable number, because it can be changed into a prime (689987789983) 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, 1481791 + ... + 1890946.

It is an arithmetic number, because the mean of its divisors is an integer number (37427273586).

Almost surely, 2^689987789986 is an apocalyptic number.

689987789986 is a deficient number, since it is larger than the sum of its proper divisors (507684964766).

689987789986 is a wasteful number, since it uses less digits than its factorization.

689987789986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373314.

The product of its digits is 47405481984, while the sum is 94.

The spelling of 689987789986 in words is "six hundred eighty-nine billion, nine hundred eighty-seven million, seven hundred eighty-nine thousand, nine hundred eighty-six".