7891489 has 4 divisors (see below), whose sum is σ = 8075056. Its totient is φ = 7707924.

The previous prime is 7891483. The next prime is 7891493. The reversal of 7891489 is 9841987.

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.

It is a cyclic number.

It is not a de Polignac number, because 7891489 - 2⁷ = 7891361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7891483) 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, 91719 + ... + 91804.

It is an arithmetic number, because the mean of its divisors is an integer number (2018764).

Almost surely, 2^7891489 is an apocalyptic number.

It is an amenable number.

7891489 is a deficient number, since it is larger than the sum of its proper divisors (183567).

7891489 is a wasteful number, since it uses less digits than its factorization.

7891489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183566.

The product of its digits is 145152, while the sum is 46.

The square root of 7891489 is about 2809.1794175524. The cubic root of 7891489 is about 199.0916221614.

It can be divided in two parts, 78914 and 89, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 7891489 in words is "seven million, eight hundred ninety-one thousand, four hundred eighty-nine".