67120409 has 2 divisors, whose sum is σ = 67120410. Its totient is φ = 67120408.

The previous prime is 67120379. The next prime is 67120441. The reversal of 67120409 is 90402176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63952009 + 3168400 = 7997^2 + 1780^2 .

It is a cyclic number.

It is not a de Polignac number, because 67120409 - 2⁸ = 67120153 is a prime.

It is not a weakly prime, because it can be changed into another prime (67120499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33560204 + 33560205.

It is an arithmetic number, because the mean of its divisors is an integer number (33560205).

Almost surely, 2^67120409 is an apocalyptic number.

It is an amenable number.

67120409 is a deficient number, since it is larger than the sum of its proper divisors (1).

67120409 is an equidigital number, since it uses as much as digits as its factorization.

67120409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 67120409 is about 8192.7046205756. The cubic root of 67120409 is about 406.3979713749.

The spelling of 67120409 in words is "sixty-seven million, one hundred twenty thousand, four hundred nine".