420940577 has 2 divisors, whose sum is σ = 420940578. Its totient is φ = 420940576.

The previous prime is 420940567. The next prime is 420940579. The reversal of 420940577 is 775049024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266211856 + 154728721 = 16316^2 + 12439^2 .

It is a cyclic number.

It is not a de Polignac number, because 420940577 - 2⁴ = 420940561 is a prime.

Together with 420940579, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420940577.

It is not a weakly prime, because it can be changed into another prime (420940579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210470288 + 210470289.

It is an arithmetic number, because the mean of its divisors is an integer number (210470289).

Almost surely, 2^420940577 is an apocalyptic number.

It is an amenable number.

420940577 is a deficient number, since it is larger than the sum of its proper divisors (1).

420940577 is an equidigital number, since it uses as much as digits as its factorization.

420940577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 420940577 is about 20516.8364276757. The cubic root of 420940577 is about 749.4458585223.

The spelling of 420940577 in words is "four hundred twenty million, nine hundred forty thousand, five hundred seventy-seven".