7998397 has 8 divisors (see below), whose sum is σ = 8772192. Its totient is φ = 7232400.

The previous prime is 7998383. The next prime is 7998409. The reversal of 7998397 is 7938997.

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 7998397 - 2⁷ = 7998269 is a prime.

7998397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998307) 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, 322 + ... + 4012.

It is an arithmetic number, because the mean of its divisors is an integer number (1096524).

Almost surely, 2^7998397 is an apocalyptic number.

It is an amenable number.

7998397 is a deficient number, since it is larger than the sum of its proper divisors (773795).

7998397 is a wasteful number, since it uses less digits than its factorization.

7998397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3899.

The product of its digits is 857304, while the sum is 52.

The square root of 7998397 is about 2828.1437375070. The cubic root of 7998397 is about 199.9866407743.

The spelling of 7998397 in words is "seven million, nine hundred ninety-eight thousand, three hundred ninety-seven".