420130409 has 2 divisors, whose sum is σ = 420130410. Its totient is φ = 420130408.

The previous prime is 420130391. The next prime is 420130423. The reversal of 420130409 is 904031024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 381030400 + 39100009 = 19520^2 + 6253^2 .

It is a cyclic number.

It is not a de Polignac number, because 420130409 - 2¹² = 420126313 is a prime.

It is a Chen prime.

It is equal to p_22351019 and since 420130409 and 22351019 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (420132409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210065204 + 210065205.

It is an arithmetic number, because the mean of its divisors is an integer number (210065205).

Almost surely, 2^420130409 is an apocalyptic number.

It is an amenable number.

420130409 is a deficient number, since it is larger than the sum of its proper divisors (1).

420130409 is an equidigital number, since it uses as much as digits as its factorization.

420130409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 420130409 is about 20497.0829387989. The cubic root of 420130409 is about 748.9647399359.

The spelling of 420130409 in words is "four hundred twenty million, one hundred thirty thousand, four hundred nine".