139639498 has 8 divisors (see below), whose sum is σ = 209562660. Its totient is φ = 69785280.

The previous prime is 139639483. The next prime is 139639499. The reversal of 139639498 is 894936931.

It can be written as a sum of positive squares in 2 ways, for example, as 126045529 + 13593969 = 11227^2 + 3687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (139639499) 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 in 3 ways as a sum of consecutive naturals, for example, 11833 + ... + 20476.

Almost surely, 2^139639498 is an apocalyptic number.

139639498 is a deficient number, since it is larger than the sum of its proper divisors (69923162).

139639498 is a wasteful number, since it uses less digits than its factorization.

139639498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34472.

The product of its digits is 1259712, while the sum is 52.

The square root of 139639498 is about 11816.9157566600. The cubic root of 139639498 is about 518.8033355332.

The spelling of 139639498 in words is "one hundred thirty-nine million, six hundred thirty-nine thousand, four hundred ninety-eight".