947293813 has 2 divisors, whose sum is σ = 947293814. Its totient is φ = 947293812.

The previous prime is 947293783. The next prime is 947293817. The reversal of 947293813 is 318392749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886967524 + 60326289 = 29782^2 + 7767^2 .

It is a cyclic number.

It is not a de Polignac number, because 947293813 - 2⁹ = 947293301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947293817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473646906 + 473646907.

It is an arithmetic number, because the mean of its divisors is an integer number (473646907).

Almost surely, 2^947293813 is an apocalyptic number.

It is an amenable number.

947293813 is a deficient number, since it is larger than the sum of its proper divisors (1).

947293813 is an equidigital number, since it uses as much as digits as its factorization.

947293813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 947293813 is about 30778.1385564494. The cubic root of 947293813 is about 982.1132424439.

It can be divided in two parts, 9472 and 93813, that added together give a triangular number (103285 = T₄₅₄).

The spelling of 947293813 in words is "nine hundred forty-seven million, two hundred ninety-three thousand, eight hundred thirteen".