814897933 has 2 divisors, whose sum is σ = 814897934. Its totient is φ = 814897932.

The previous prime is 814897931. The next prime is 814897939. The reversal of 814897933 is 339798418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 446181129 + 368716804 = 21123^2 + 19202^2 .

It is a cyclic number.

It is not a de Polignac number, because 814897933 - 2¹ = 814897931 is a prime.

Together with 814897931, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814897931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407448966 + 407448967.

It is an arithmetic number, because the mean of its divisors is an integer number (407448967).

Almost surely, 2^814897933 is an apocalyptic number.

It is an amenable number.

814897933 is a deficient number, since it is larger than the sum of its proper divisors (1).

814897933 is an equidigital number, since it uses as much as digits as its factorization.

814897933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 814897933 is about 28546.4171657320. The cubic root of 814897933 is about 934.0448682873.

The spelling of 814897933 in words is "eight hundred fourteen million, eight hundred ninety-seven thousand, nine hundred thirty-three".