7897389 has 4 divisors (see below), whose sum is σ = 10529856. Its totient is φ = 5264924.

The previous prime is 7897387. The next prime is 7897397. The reversal of 7897389 is 9837987.

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: 9837987 = 3 ⋅3279329.

It is a cyclic number.

It is not a de Polignac number, because 7897389 - 2¹ = 7897387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316229 + ... + 1316234.

It is an arithmetic number, because the mean of its divisors is an integer number (2632464).

Almost surely, 2^7897389 is an apocalyptic number.

It is an amenable number.

7897389 is a deficient number, since it is larger than the sum of its proper divisors (2632467).

7897389 is a wasteful number, since it uses less digits than its factorization.

7897389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632466.

The product of its digits is 762048, while the sum is 51.

The square root of 7897389 is about 2810.2293500709. The cubic root of 7897389 is about 199.1412261485.

The spelling of 7897389 in words is "seven million, eight hundred ninety-seven thousand, three hundred eighty-nine".