67079421 has 12 divisors (see below), whose sum is σ = 100481472. Its totient is φ = 44719452.

The previous prime is 67079393. The next prime is 67079423. The reversal of 67079421 is 12497076.

It is a happy number.

It is not a de Polignac number, because 67079421 - 2¹⁴ = 67063037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67079423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137781 + ... + 138266.

It is an arithmetic number, because the mean of its divisors is an integer number (8373456).

Almost surely, 2^67079421 is an apocalyptic number.

It is an amenable number.

67079421 is a deficient number, since it is larger than the sum of its proper divisors (33402051).

67079421 is an equidigital number, since it uses as much as digits as its factorization.

67079421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276062 (or 276050 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 67079421 is about 8190.2027447433. The cubic root of 67079421 is about 406.3152303619.

The spelling of 67079421 in words is "sixty-seven million, seventy-nine thousand, four hundred twenty-one".