419940706921 has 4 divisors (see below), whose sum is σ = 420847706752. Its totient is φ = 419033707092.

The previous prime is 419940706919. The next prime is 419940706931. The reversal of 419940706921 is 129607049914.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129607049914 = 2 ⋅64803524957.

It is a cyclic number.

It is not a de Polignac number, because 419940706921 - 2¹ = 419940706919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (419940706931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453499221 + ... + 453500146.

It is an arithmetic number, because the mean of its divisors is an integer number (105211926688).

Almost surely, 2^419940706921 is an apocalyptic number.

It is an amenable number.

419940706921 is a deficient number, since it is larger than the sum of its proper divisors (906999831).

419940706921 is an equidigital number, since it uses as much as digits as its factorization.

419940706921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906999830.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 419940706921 in words is "four hundred nineteen billion, nine hundred forty million, seven hundred six thousand, nine hundred twenty-one".