67613231 has 4 divisors (see below), whose sum is σ = 77272272. Its totient is φ = 57954192.

The previous prime is 67613209. The next prime is 67613291. The reversal of 67613231 is 13231676.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67613231 is a prime.

It is a super-2 number, since 2×67613231² = 9143098012518722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67613194 and 67613203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67613291) 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 3 ways as a sum of consecutive naturals, for example, 4829510 + ... + 4829523.

It is an arithmetic number, because the mean of its divisors is an integer number (19318068).

Almost surely, 2^67613231 is an apocalyptic number.

67613231 is a deficient number, since it is larger than the sum of its proper divisors (9659041).

67613231 is an equidigital number, since it uses as much as digits as its factorization.

67613231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9659040.

The product of its digits is 4536, while the sum is 29.

The square root of 67613231 is about 8222.7264942962. The cubic root of 67613231 is about 407.3901865768.

The spelling of 67613231 in words is "sixty-seven million, six hundred thirteen thousand, two hundred thirty-one".