137398 has 4 divisors (see below), whose sum is σ = 206100. Its totient is φ = 68698.

The previous prime is 137393. The next prime is 137399. The reversal of 137398 is 893731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893731 = 103 ⋅8677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137393) by changing a digit.

137398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34348 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (51525).

2¹³⁷³⁹⁸ is an apocalyptic number.

137398 is a deficient number, since it is larger than the sum of its proper divisors (68702).

137398 is an equidigital number, since it uses as much as digits as its factorization.

137398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68701.

The product of its digits is 4536, while the sum is 31.

The square root of 137398 is about 370.6723620666. The cubic root of 137398 is about 51.6012398797.

It can be divided in two parts, 137 and 398, that added together give a palindrome (535).

The spelling of 137398 in words is "one hundred thirty-seven thousand, three hundred ninety-eight".