814470691 has 2 divisors, whose sum is σ = 814470692. Its totient is φ = 814470690.

The previous prime is 814470689. The next prime is 814470721. The reversal of 814470691 is 196074418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 814470691 - 2¹ = 814470689 is a prime.

Together with 814470689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (814470091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407235345 + 407235346.

It is an arithmetic number, because the mean of its divisors is an integer number (407235346).

Almost surely, 2^814470691 is an apocalyptic number.

814470691 is a deficient number, since it is larger than the sum of its proper divisors (1).

814470691 is an equidigital number, since it uses as much as digits as its factorization.

814470691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 814470691 is about 28538.9328987613. The cubic root of 814470691 is about 933.8816032766.

The spelling of 814470691 in words is "eight hundred fourteen million, four hundred seventy thousand, six hundred ninety-one".