139143568 has 10 divisors (see below), whose sum is σ = 269590694. Its totient is φ = 69571776.

The previous prime is 139143553. The next prime is 139143601. The reversal of 139143568 is 865341931.

It can be written as a sum of positive squares in only one way, i.e., 138956944 + 186624 = 11788^2 + 432^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 139143568.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4348221 + ... + 4348252.

Almost surely, 2^139143568 is an apocalyptic number.

It is an amenable number.

139143568 is a deficient number, since it is larger than the sum of its proper divisors (130447126).

139143568 is an equidigital number, since it uses as much as digits as its factorization.

139143568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696481 (or 8696475 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 139143568 is about 11795.9131905927. The cubic root of 139143568 is about 518.1884299295.

The spelling of 139143568 in words is "one hundred thirty-nine million, one hundred forty-three thousand, five hundred sixty-eight".