814915081 has 2 divisors, whose sum is σ = 814915082. Its totient is φ = 814915080.

The previous prime is 814915069. The next prime is 814915097. The reversal of 814915081 is 180519418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766403856 + 48511225 = 27684^2 + 6965^2 .

It is a cyclic number.

It is not a de Polignac number, because 814915081 - 2¹⁹ = 814390793 is a prime.

It is a super-2 number, since 2×814915081² = 1328173178482473122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 814915081.

It is not a weakly prime, because it can be changed into another prime (814910081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407457540 + 407457541.

It is an arithmetic number, because the mean of its divisors is an integer number (407457541).

Almost surely, 2^814915081 is an apocalyptic number.

It is an amenable number.

814915081 is a deficient number, since it is larger than the sum of its proper divisors (1).

814915081 is an equidigital number, since it uses as much as digits as its factorization.

814915081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 814915081 is about 28546.7175170807. The cubic root of 814915081 is about 934.0514199827.

The spelling of 814915081 in words is "eight hundred fourteen million, nine hundred fifteen thousand, eighty-one".