67470421 has 2 divisors, whose sum is σ = 67470422. Its totient is φ = 67470420.

The previous prime is 67470413. The next prime is 67470437. The reversal of 67470421 is 12407476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67469796 + 625 = 8214^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 67470421 - 2³ = 67470413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67471421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33735210 + 33735211.

It is an arithmetic number, because the mean of its divisors is an integer number (33735211).

Almost surely, 2^67470421 is an apocalyptic number.

It is an amenable number.

67470421 is a deficient number, since it is larger than the sum of its proper divisors (1).

67470421 is an equidigital number, since it uses as much as digits as its factorization.

67470421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 67470421 is about 8214.0380447135. The cubic root of 67470421 is about 407.1031599045.

Adding to 67470421 its reverse (12407476), we get a palindrome (79877897).

The spelling of 67470421 in words is "sixty-seven million, four hundred seventy thousand, four hundred twenty-one".