818432047 has 2 divisors, whose sum is σ = 818432048. Its totient is φ = 818432046.

The previous prime is 818431967. The next prime is 818432057. The reversal of 818432047 is 740234818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818432047 - 2²³ = 810043439 is a prime.

It is a super-2 number, since 2×818432047² = 1339662031113220418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 818431997 and 818432015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818432057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409216023 + 409216024.

It is an arithmetic number, because the mean of its divisors is an integer number (409216024).

Almost surely, 2^818432047 is an apocalyptic number.

818432047 is a deficient number, since it is larger than the sum of its proper divisors (1).

818432047 is an equidigital number, since it uses as much as digits as its factorization.

818432047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 818432047 is about 28608.2513796282. The cubic root of 818432047 is about 935.3932009367.

The spelling of 818432047 in words is "eight hundred eighteen million, four hundred thirty-two thousand, forty-seven".