421190773 has 2 divisors, whose sum is σ = 421190774. Its totient is φ = 421190772.

The previous prime is 421190771. The next prime is 421190779. The reversal of 421190773 is 377091124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327139569 + 94051204 = 18087^2 + 9698^2 .

It is a cyclic number.

It is not a de Polignac number, because 421190773 - 2¹ = 421190771 is a prime.

Together with 421190771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421190771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210595386 + 210595387.

It is an arithmetic number, because the mean of its divisors is an integer number (210595387).

Almost surely, 2^421190773 is an apocalyptic number.

It is an amenable number.

421190773 is a deficient number, since it is larger than the sum of its proper divisors (1).

421190773 is an equidigital number, since it uses as much as digits as its factorization.

421190773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 421190773 is about 20522.9328557105. The cubic root of 421190773 is about 749.5943127448.

The spelling of 421190773 in words is "four hundred twenty-one million, one hundred ninety thousand, seven hundred seventy-three".