67840331 has 4 divisors (see below), whose sum is σ = 73058832. Its totient is φ = 62621832.

The previous prime is 67840327. The next prime is 67840337. The reversal of 67840331 is 13304876.

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

It is not a de Polignac number, because 67840331 - 2² = 67840327 is a prime.

It is a super-2 number, since 2×67840331² = 9204621020379122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67840337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2609231 + ... + 2609256.

It is an arithmetic number, because the mean of its divisors is an integer number (18264708).

Almost surely, 2^67840331 is an apocalyptic number.

67840331 is a deficient number, since it is larger than the sum of its proper divisors (5218501).

67840331 is a wasteful number, since it uses less digits than its factorization.

67840331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218500.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 67840331 is about 8236.5242062414. The cubic root of 67840331 is about 407.8457922773.

The spelling of 67840331 in words is "sixty-seven million, eight hundred forty thousand, three hundred thirty-one".