1818075997 has 8 divisors (see below), whose sum is σ = 1863715392. Its totient is φ = 1772498400.

The previous prime is 1818075979. The next prime is 1818076037. The reversal of 1818075997 is 7995708181.

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

It is a cyclic number.

It is not a de Polignac number, because 1818075997 - 2¹¹ = 1818073949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818075397) 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, 47278 + ... + 76624.

It is an arithmetic number, because the mean of its divisors is an integer number (232964424).

Almost surely, 2^1818075997 is an apocalyptic number.

It is an amenable number.

1818075997 is a deficient number, since it is larger than the sum of its proper divisors (45639395).

1818075997 is a wasteful number, since it uses less digits than its factorization.

1818075997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30899.

The product of its (nonzero) digits is 1270080, while the sum is 55.

The square root of 1818075997 is about 42638.9023897192. The cubic root of 1818075997 is about 1220.4987652042.

The spelling of 1818075997 in words is "one billion, eight hundred eighteen million, seventy-five thousand, nine hundred ninety-seven".