618281997 has 8 divisors (see below), whose sum is σ = 824492256. Its totient is φ = 412129872.

The previous prime is 618281969. The next prime is 618282017. The reversal of 618281997 is 799182816.

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

It is not a de Polignac number, because 618281997 - 2⁶ = 618281933 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618281957) 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, 28438 + ... + 45224.

It is an arithmetic number, because the mean of its divisors is an integer number (103061532).

Almost surely, 2^618281997 is an apocalyptic number.

It is an amenable number.

618281997 is a deficient number, since it is larger than the sum of its proper divisors (206210259).

618281997 is a wasteful number, since it uses less digits than its factorization.

618281997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29067.

The product of its digits is 435456, while the sum is 51.

The square root of 618281997 is about 24865.2769339093. The cubic root of 618281997 is about 851.9135652028.

The spelling of 618281997 in words is "six hundred eighteen million, two hundred eighty-one thousand, nine hundred ninety-seven".