67643242 has 8 divisors (see below), whose sum is σ = 101721636. Its totient is φ = 33736032.

The previous prime is 67643239. The next prime is 67643243. The reversal of 67643242 is 24234676.

It can be written as a sum of positive squares in 2 ways, for example, as 65950641 + 1692601 = 8121^2 + 1301^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 67643198 and 67643207.

It is not an unprimeable number, because it can be changed into a prime (67643243) 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, 41803 + ... + 43390.

Almost surely, 2^67643242 is an apocalyptic number.

67643242 is a deficient number, since it is larger than the sum of its proper divisors (34078394).

67643242 is a wasteful number, since it uses less digits than its factorization.

67643242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85592.

The product of its digits is 48384, while the sum is 34.

The square root of 67643242 is about 8224.5511731644. The cubic root of 67643242 is about 407.4504527813.

The spelling of 67643242 in words is "sixty-seven million, six hundred forty-three thousand, two hundred forty-two".