420198047 has 2 divisors, whose sum is σ = 420198048. Its totient is φ = 420198046.

The previous prime is 420198007. The next prime is 420198049. The reversal of 420198047 is 740891024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420198047 - 2⁶ = 420197983 is a prime.

It is a super-2 number, since 2×420198047² = 353132797405228418, which contains 22 as substring.

Together with 420198049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 420197998 and 420198016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420198049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210099023 + 210099024.

It is an arithmetic number, because the mean of its divisors is an integer number (210099024).

Almost surely, 2^420198047 is an apocalyptic number.

420198047 is a deficient number, since it is larger than the sum of its proper divisors (1).

420198047 is an equidigital number, since it uses as much as digits as its factorization.

420198047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 420198047 is about 20498.7328144937. The cubic root of 420198047 is about 749.0049304400.

The spelling of 420198047 in words is "four hundred twenty million, one hundred ninety-eight thousand, forty-seven".