819126047 has 2 divisors, whose sum is σ = 819126048. Its totient is φ = 819126046.

The previous prime is 819126037. The next prime is 819126067. The reversal of 819126047 is 740621918.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-819126047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 819126047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819126037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409563023 + 409563024.

It is an arithmetic number, because the mean of its divisors is an integer number (409563024).

Almost surely, 2^819126047 is an apocalyptic number.

819126047 is a deficient number, since it is larger than the sum of its proper divisors (1).

819126047 is an equidigital number, since it uses as much as digits as its factorization.

819126047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 819126047 is about 28620.3781770961. The cubic root of 819126047 is about 935.6575191459.

The spelling of 819126047 in words is "eight hundred nineteen million, one hundred twenty-six thousand, forty-seven".