420893071 has 2 divisors, whose sum is σ = 420893072. Its totient is φ = 420893070.

The previous prime is 420893051. The next prime is 420893147. The reversal of 420893071 is 170398024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420893071 - 2⁹ = 420892559 is a prime.

It is a super-2 number, since 2×420893071² = 354301954431622082, which contains 22 as substring.

It is equal to p_22389505 and since 420893071 and 22389505 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420893051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210446535 + 210446536.

It is an arithmetic number, because the mean of its divisors is an integer number (210446536).

Almost surely, 2^420893071 is an apocalyptic number.

420893071 is a deficient number, since it is larger than the sum of its proper divisors (1).

420893071 is an equidigital number, since it uses as much as digits as its factorization.

420893071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 420893071 is about 20515.6786629153. The cubic root of 420893071 is about 749.4176641117.

It can be divided in two parts, 4208 and 93071, that added together give a palindrome (97279).

The spelling of 420893071 in words is "four hundred twenty million, eight hundred ninety-three thousand, seventy-one".