67138 has 4 divisors (see below), whose sum is σ = 100710. Its totient is φ = 33568.

The previous prime is 67129. The next prime is 67139. The reversal of 67138 is 83176.

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

It can be written as a sum of positive squares in only one way, i.e., 66049 + 1089 = 257^2 + 33^2 .

It is a super-2 number, since 2×67138² = 9015022088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16783 + ... + 16786.

2⁶⁷¹³⁸ is an apocalyptic number.

67138 is the 139-th centered heptagonal number.

67138 is a deficient number, since it is larger than the sum of its proper divisors (33572).

67138 is a wasteful number, since it uses less digits than its factorization.

67138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33571.

The product of its digits is 1008, while the sum is 25.

The square root of 67138 is about 259.1100152445. The cubic root of 67138 is about 40.6433471368.

The spelling of 67138 in words is "sixty-seven thousand, one hundred thirty-eight".