67140831 has 8 divisors (see below), whose sum is σ = 89570560. Its totient is φ = 44735832.

The previous prime is 67140817. The next prime is 67140869. The reversal of 67140831 is 13804176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-67140831 is a prime.

It is a super-2 number, since 2×67140831² = 9015782374741122, 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 (67140811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (11196320).

Almost surely, 2^67140831 is an apocalyptic number.

67140831 is a deficient number, since it is larger than the sum of its proper divisors (22429729).

67140831 is a wasteful number, since it uses less digits than its factorization.

67140831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12365.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 67140831 is about 8193.9508785445. The cubic root of 67140831 is about 406.4391839653.

The spelling of 67140831 in words is "sixty-seven million, one hundred forty thousand, eight hundred thirty-one".