420164237 has 2 divisors, whose sum is σ = 420164238. Its totient is φ = 420164236.

The previous prime is 420164221. The next prime is 420164243. The reversal of 420164237 is 732461024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397563721 + 22600516 = 19939^2 + 4754^2 .

It is a cyclic number.

It is not a de Polignac number, because 420164237 - 2⁴ = 420164221 is a prime.

It is a super-3 number, since 3×420164237³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420164257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210082118 + 210082119.

It is an arithmetic number, because the mean of its divisors is an integer number (210082119).

Almost surely, 2^420164237 is an apocalyptic number.

It is an amenable number.

420164237 is a deficient number, since it is larger than the sum of its proper divisors (1).

420164237 is an equidigital number, since it uses as much as digits as its factorization.

420164237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 420164237 is about 20497.9081127807. The cubic root of 420164237 is about 748.9848410749.

The spelling of 420164237 in words is "four hundred twenty million, one hundred sixty-four thousand, two hundred thirty-seven".