8018397 has 6 divisors (see below), whose sum is σ = 11582142. Its totient is φ = 5345592.

The previous prime is 8018383. The next prime is 8018419. The reversal of 8018397 is 7938108.

It can be written as a sum of positive squares in only one way, i.e., 4756761 + 3261636 = 2181^2 + 1806^2 .

It is not a de Polignac number, because 8018397 - 2⁶ = 8018333 is a prime.

8018397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8018327) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 445458 + ... + 445475.

It is an arithmetic number, because the mean of its divisors is an integer number (1930357).

Almost surely, 2^8018397 is an apocalyptic number.

It is an amenable number.

8018397 is a deficient number, since it is larger than the sum of its proper divisors (3563745).

8018397 is a wasteful number, since it uses less digits than its factorization.

8018397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890939 (or 890936 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 8018397 is about 2831.6774180687. The cubic root of 8018397 is about 200.1531909660.

The spelling of 8018397 in words is "eight million, eighteen thousand, three hundred ninety-seven".