419191921 has 2 divisors, whose sum is σ = 419191922. Its totient is φ = 419191920.

The previous prime is 419191901. The next prime is 419191943. The reversal of 419191921 is 129191914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395572321 + 23619600 = 19889^2 + 4860^2 .

It is a cyclic number.

It is not a de Polignac number, because 419191921 - 2⁷ = 419191793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (419191901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209595960 + 209595961.

It is an arithmetic number, because the mean of its divisors is an integer number (209595961).

Almost surely, 2^419191921 is an apocalyptic number.

It is an amenable number.

419191921 is a deficient number, since it is larger than the sum of its proper divisors (1).

419191921 is an equidigital number, since it uses as much as digits as its factorization.

419191921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 37.

The square root of 419191921 is about 20474.1769309538. The cubic root of 419191921 is about 748.4066446146.

The spelling of 419191921 in words is "four hundred nineteen million, one hundred ninety-one thousand, nine hundred twenty-one".