67430421 has 8 divisors (see below), whose sum is σ = 99896960. Its totient is φ = 44953596.

The previous prime is 67430417. The next prime is 67430431. The reversal of 67430421 is 12403476.

It is not a de Polignac number, because 67430421 - 2² = 67430417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2497423 = 67430421 / (6 + 7 + 4 + 3 + 0 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67430431) 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, 1248685 + ... + 1248738.

It is an arithmetic number, because the mean of its divisors is an integer number (12487120).

Almost surely, 2^67430421 is an apocalyptic number.

It is an amenable number.

67430421 is a deficient number, since it is larger than the sum of its proper divisors (32466539).

67430421 is a wasteful number, since it uses less digits than its factorization.

67430421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497432 (or 2497426 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 67430421 is about 8211.6028277067. The cubic root of 67430421 is about 407.0226933077.

Adding to 67430421 its reverse (12403476), we get a palindrome (79833897).

The spelling of 67430421 in words is "sixty-seven million, four hundred thirty thousand, four hundred twenty-one".