138798502 has 4 divisors (see below), whose sum is σ = 208197756. Its totient is φ = 69399250.

The previous prime is 138798487. The next prime is 138798509. The reversal of 138798502 is 205897831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138798509) 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, 34699624 + ... + 34699627.

It is an arithmetic number, because the mean of its divisors is an integer number (52049439).

Almost surely, 2^138798502 is an apocalyptic number.

138798502 is a deficient number, since it is larger than the sum of its proper divisors (69399254).

138798502 is an equidigital number, since it uses as much as digits as its factorization.

138798502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69399253.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 138798502 is about 11781.2776047422. The cubic root of 138798502 is about 517.7597187151.

The spelling of 138798502 in words is "one hundred thirty-eight million, seven hundred ninety-eight thousand, five hundred two".