8997993 has 16 divisors (see below), whose sum is σ = 13692160. Its totient is φ = 5835888.

The previous prime is 8997979. The next prime is 8998061. The reversal of 8997993 is 3997998.

It is a happy number.

8997993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8997993 - 2¹⁶ = 8932457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8997943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3505 + ... + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (855760).

Almost surely, 2^8997993 is an apocalyptic number.

It is an amenable number.

8997993 is a deficient number, since it is larger than the sum of its proper divisors (4694167).

8997993 is a wasteful number, since it uses less digits than its factorization.

8997993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9053 (or 9047 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 8997993 is about 2999.6654813495. The cubic root of 8997993 is about 207.9929191993.

It can be divided in two parts, 8 and 997993, that added together give a square (998001 = 999²).

The spelling of 8997993 in words is "eight million, nine hundred ninety-seven thousand, nine hundred ninety-three".