67361381 has 4 divisors (see below), whose sum is σ = 67457100. Its totient is φ = 67265664.

The previous prime is 67361347. The next prime is 67361383. The reversal of 67361381 is 18316376.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14508481 + 52852900 = 3809^2 + 7270^2 .

It is a cyclic number.

It is not a de Polignac number, because 67361381 - 2⁶ = 67361317 is a prime.

It is a super-2 number, since 2×67361381² = 9075111300454322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67361383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46796 + ... + 48213.

It is an arithmetic number, because the mean of its divisors is an integer number (16864275).

Almost surely, 2^67361381 is an apocalyptic number.

It is an amenable number.

67361381 is a deficient number, since it is larger than the sum of its proper divisors (95719).

67361381 is an equidigital number, since it uses as much as digits as its factorization.

67361381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95718.

The product of its digits is 18144, while the sum is 35.

The square root of 67361381 is about 8207.3979433192. The cubic root of 67361381 is about 406.8837330663.

The spelling of 67361381 in words is "sixty-seven million, three hundred sixty-one thousand, three hundred eighty-one".