137798 has 4 divisors (see below), whose sum is σ = 206700. Its totient is φ = 68898.

The previous prime is 137791. The next prime is 137803. The reversal of 137798 is 897731.

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 (137791) by changing a digit.

137798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34448 + ... + 34451.

It is an arithmetic number, because the mean of its divisors is an integer number (51675).

137798 is a Friedman number, since it can be written as 8+9*(7*3^7+1), using all its digits and the basic arithmetic operations.

2¹³⁷⁷⁹⁸ is an apocalyptic number.

137798 is a deficient number, since it is larger than the sum of its proper divisors (68902).

137798 is an equidigital number, since it uses as much as digits as its factorization.

137798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68901.

The product of its digits is 10584, while the sum is 35.

The square root of 137798 is about 371.2115299933. The cubic root of 137798 is about 51.6512660770.

The spelling of 137798 in words is "one hundred thirty-seven thousand, seven hundred ninety-eight".