814397618 has 4 divisors (see below), whose sum is σ = 1221596430. Its totient is φ = 407198808.

The previous prime is 814397581. The next prime is 814397653. The reversal of 814397618 is 816793418.

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

It can be written as a sum of positive squares in only one way, i.e., 814360369 + 37249 = 28537^2 + 193^2 .

It is an unprimeable number.

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, 203599403 + ... + 203599406.

Almost surely, 2^814397618 is an apocalyptic number.

814397618 is a deficient number, since it is larger than the sum of its proper divisors (407198812).

814397618 is a wasteful number, since it uses less digits than its factorization.

814397618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407198811.

The product of its digits is 290304, while the sum is 47.

The square root of 814397618 is about 28537.6526364731. The cubic root of 814397618 is about 933.8536736563.

The spelling of 814397618 in words is "eight hundred fourteen million, three hundred ninety-seven thousand, six hundred eighteen".