819874411 has 2 divisors, whose sum is σ = 819874412. Its totient is φ = 819874410.

The previous prime is 819874387. The next prime is 819874463. The reversal of 819874411 is 114478918.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 819874411 - 2²⁵ = 786319979 is a prime.

It is not a weakly prime, because it can be changed into another prime (819874481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409937205 + 409937206.

It is an arithmetic number, because the mean of its divisors is an integer number (409937206).

Almost surely, 2^819874411 is an apocalyptic number.

819874411 is a deficient number, since it is larger than the sum of its proper divisors (1).

819874411 is an equidigital number, since it uses as much as digits as its factorization.

819874411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 43.

The square root of 819874411 is about 28633.4491635220. The cubic root of 819874411 is about 935.9423752937.

The spelling of 819874411 in words is "eight hundred nineteen million, eight hundred seventy-four thousand, four hundred eleven".