420499771 has 2 divisors, whose sum is σ = 420499772. Its totient is φ = 420499770.

The previous prime is 420499769. The next prime is 420499787. The reversal of 420499771 is 177994024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420499771 - 2¹ = 420499769 is a prime.

It is a super-2 number, since 2×420499771² = 353640114822104882, which contains 22 as substring.

Together with 420499769, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (420499711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210249885 + 210249886.

It is an arithmetic number, because the mean of its divisors is an integer number (210249886).

Almost surely, 2^420499771 is an apocalyptic number.

420499771 is a deficient number, since it is larger than the sum of its proper divisors (1).

420499771 is an equidigital number, since it uses as much as digits as its factorization.

420499771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 420499771 is about 20506.0910707038. The cubic root of 420499771 is about 749.1841623485.

The spelling of 420499771 in words is "four hundred twenty million, four hundred ninety-nine thousand, seven hundred seventy-one".