421719960973469 has 2 divisors, whose sum is σ = 421719960973470. Its totient is φ = 421719960973468.

The previous prime is 421719960973411. The next prime is 421719960973481. The reversal of 421719960973469 is 964379069917124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263070947569444 + 158649013404025 = 16219462^2 + 12595595^2 .

It is a cyclic number.

It is not a de Polignac number, because 421719960973469 - 2²⁴ = 421719944196253 is a prime.

It is a super-2 number, since 2×421719960973469² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421719960973469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421719960973499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210859980486734 + 210859980486735.

It is an arithmetic number, because the mean of its divisors is an integer number (210859980486735).

Almost surely, 2^{421719960973469} is an apocalyptic number.

It is an amenable number.

421719960973469 is a deficient number, since it is larger than the sum of its proper divisors (1).

421719960973469 is an equidigital number, since it uses as much as digits as its factorization.

421719960973469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111065984, while the sum is 77.

The spelling of 421719960973469 in words is "four hundred twenty-one trillion, seven hundred nineteen billion, nine hundred sixty million, nine hundred seventy-three thousand, four hundred sixty-nine".