420190597 has 2 divisors, whose sum is σ = 420190598. Its totient is φ = 420190596.

The previous prime is 420190583. The next prime is 420190601. The reversal of 420190597 is 795091024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342768196 + 77422401 = 18514^2 + 8799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420190597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420190297) 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, 210095298 + 210095299.

It is an arithmetic number, because the mean of its divisors is an integer number (210095299).

Almost surely, 2^420190597 is an apocalyptic number.

It is an amenable number.

420190597 is a deficient number, since it is larger than the sum of its proper divisors (1).

420190597 is an equidigital number, since it uses as much as digits as its factorization.

420190597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 420190597 is about 20498.5510951384. The cubic root of 420190597 is about 749.0005038609. Note that the first 3 decimals are identical.

The spelling of 420190597 in words is "four hundred twenty million, one hundred ninety thousand, five hundred ninety-seven".