67439161 has 8 divisors (see below), whose sum is σ = 68833800. Its totient is φ = 66049152.

The previous prime is 67439143. The next prime is 67439173. The reversal of 67439161 is 16193476.

It can be written as a sum of positive squares in 4 ways, for example, as 12960000 + 54479161 = 3600^2 + 7381^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 67439161 - 2⁵ = 67439129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67439161.

It is not an unprimeable number, because it can be changed into a prime (67439261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54991 + ... + 56203.

It is an arithmetic number, because the mean of its divisors is an integer number (8604225).

Almost surely, 2^67439161 is an apocalyptic number.

It is an amenable number.

67439161 is a deficient number, since it is larger than the sum of its proper divisors (1394639).

67439161 is a wasteful number, since it uses less digits than its factorization.

67439161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315.

The product of its digits is 27216, while the sum is 37.

The square root of 67439161 is about 8212.1349842778. The cubic root of 67439161 is about 407.0402779755.

It can be divided in two parts, 67439 and 161, that added together give a square (67600 = 260²).

The spelling of 67439161 in words is "sixty-seven million, four hundred thirty-nine thousand, one hundred sixty-one".