814693691 has 4 divisors (see below), whose sum is σ = 931078512. Its totient is φ = 698308872.

The previous prime is 814693681. The next prime is 814693699. The reversal of 814693691 is 196396418.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 814693691 - 2²² = 810499387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (814693699) 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 in 3 ways as a sum of consecutive naturals, for example, 58192400 + ... + 58192413.

It is an arithmetic number, because the mean of its divisors is an integer number (232769628).

Almost surely, 2^814693691 is an apocalyptic number.

814693691 is a deficient number, since it is larger than the sum of its proper divisors (116384821).

814693691 is a wasteful number, since it uses less digits than its factorization.

814693691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116384820.

The product of its digits is 279936, while the sum is 47.

The square root of 814693691 is about 28542.8395749267. The cubic root of 814693691 is about 933.9668269669.

The spelling of 814693691 in words is "eight hundred fourteen million, six hundred ninety-three thousand, six hundred ninety-one".