139452868 has 6 divisors (see below), whose sum is σ = 244042526. Its totient is φ = 69726432.

The previous prime is 139452847. The next prime is 139452869. The reversal of 139452868 is 868254931.

It can be written as a sum of positive squares in only one way, i.e., 114532804 + 24920064 = 10702^2 + 4992^2 .

It is not an unprimeable number, because it can be changed into a prime (139452869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17431605 + ... + 17431612.

Almost surely, 2^139452868 is an apocalyptic number.

It is an amenable number.

139452868 is a deficient number, since it is larger than the sum of its proper divisors (104589658).

139452868 is a wasteful number, since it uses less digits than its factorization.

139452868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34863221 (or 34863219 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 139452868 is about 11809.0163857961. The cubic root of 139452868 is about 518.5721033589.

The spelling of 139452868 in words is "one hundred thirty-nine million, four hundred fifty-two thousand, eight hundred sixty-eight".