7887397 has 4 divisors (see below), whose sum is σ = 9014176. Its totient is φ = 6760620.

The previous prime is 7887359. The next prime is 7887403. The reversal of 7887397 is 7937887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7937887 = 41 ⋅193607.

It is a cyclic number.

It is not a de Polignac number, because 7887397 - 2¹¹ = 7885349 is a prime.

It is a super-2 number, since 2×7887397² = 124422062871218, which contains 22 as substring.

It is a Duffinian number.

7887397 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7887397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7887317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563379 + ... + 563392.

It is an arithmetic number, because the mean of its divisors is an integer number (2253544).

Almost surely, 2^7887397 is an apocalyptic number.

It is an amenable number.

7887397 is a deficient number, since it is larger than the sum of its proper divisors (1126779).

7887397 is a wasteful number, since it uses less digits than its factorization.

7887397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126778.

The product of its digits is 592704, while the sum is 49.

The square root of 7887397 is about 2808.4509965460. The cubic root of 7887397 is about 199.0572043318.

The spelling of 7887397 in words is "seven million, eight hundred eighty-seven thousand, three hundred ninety-seven".