420234137 has 2 divisors, whose sum is σ = 420234138. Its totient is φ = 420234136.

The previous prime is 420234121. The next prime is 420234149. The reversal of 420234137 is 731432024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416608921 + 3625216 = 20411^2 + 1904^2 .

It is a cyclic number.

It is not a de Polignac number, because 420234137 - 2⁴ = 420234121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420234107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210117068 + 210117069.

It is an arithmetic number, because the mean of its divisors is an integer number (210117069).

Almost surely, 2^420234137 is an apocalyptic number.

It is an amenable number.

420234137 is a deficient number, since it is larger than the sum of its proper divisors (1).

420234137 is an equidigital number, since it uses as much as digits as its factorization.

420234137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 420234137 is about 20499.6130939098. The cubic root of 420234137 is about 749.0263733559.

The spelling of 420234137 in words is "four hundred twenty million, two hundred thirty-four thousand, one hundred thirty-seven".