814997091 has 8 divisors (see below), whose sum is σ = 1087550464. Its totient is φ = 542887560.

The previous prime is 814997081. The next prime is 814997129. The reversal of 814997091 is 190799418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 814997091 - 2¹⁰ = 814996067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 814997091.

It is not an unprimeable number, because it can be changed into a prime (814997011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106651 + ... + 114036.

It is an arithmetic number, because the mean of its divisors is an integer number (135943808).

Almost surely, 2^814997091 is an apocalyptic number.

814997091 is a deficient number, since it is larger than the sum of its proper divisors (272553373).

814997091 is a wasteful number, since it uses less digits than its factorization.

814997091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221921.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 814997091 is about 28548.1538982821. The cubic root of 814997091 is about 934.0827520766.

The spelling of 814997091 in words is "eight hundred fourteen million, nine hundred ninety-seven thousand, ninety-one".