819484957 has 2 divisors, whose sum is σ = 819484958. Its totient is φ = 819484956.

The previous prime is 819484937. The next prime is 819485011. The reversal of 819484957 is 759484918.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 587044441 + 232440516 = 24229^2 + 15246^2 .

It is a cyclic number.

It is not a de Polignac number, because 819484957 - 2¹⁵ = 819452189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 819484898 and 819484907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (819484937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409742478 + 409742479.

It is an arithmetic number, because the mean of its divisors is an integer number (409742479).

Almost surely, 2^819484957 is an apocalyptic number.

It is an amenable number.

819484957 is a deficient number, since it is larger than the sum of its proper divisors (1).

819484957 is an equidigital number, since it uses as much as digits as its factorization.

819484957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 55.

The square root of 819484957 is about 28626.6476731035. The cubic root of 819484957 is about 935.7941557503.

The spelling of 819484957 in words is "eight hundred nineteen million, four hundred eighty-four thousand, nine hundred fifty-seven".