139798 has 4 divisors (see below), whose sum is σ = 209700. Its totient is φ = 69898.

The previous prime is 139787. The next prime is 139801. The reversal of 139798 is 897931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34948 + ... + 34951.

It is an arithmetic number, because the mean of its divisors is an integer number (52425).

2¹³⁹⁷⁹⁸ is an apocalyptic number.

139798 is a deficient number, since it is larger than the sum of its proper divisors (69902).

139798 is an equidigital number, since it uses as much as digits as its factorization.

139798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69901.

The product of its digits is 13608, while the sum is 37.

The square root of 139798 is about 373.8957073838. The cubic root of 139798 is about 51.8999555738.

The spelling of 139798 in words is "one hundred thirty-nine thousand, seven hundred ninety-eight".