7989453 has 6 divisors (see below), whose sum is σ = 11540334. Its totient is φ = 5326296.

The previous prime is 7989437. The next prime is 7989461. The reversal of 7989453 is 3549897.

It can be written as a sum of positive squares in only one way, i.e., 6985449 + 1004004 = 2643^2 + 1002^2 .

It is not a de Polignac number, because 7989453 - 2⁴ = 7989437 is a prime.

7989453 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7989399 and 7989408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443850 + ... + 443867.

It is an arithmetic number, because the mean of its divisors is an integer number (1923389).

Almost surely, 2^7989453 is an apocalyptic number.

It is an amenable number.

7989453 is a deficient number, since it is larger than the sum of its proper divisors (3550881).

7989453 is a wasteful number, since it uses less digits than its factorization.

7989453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887723 (or 887720 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 7989453 is about 2826.5620460199. The cubic root of 7989453 is about 199.9120696803.

The spelling of 7989453 in words is "seven million, nine hundred eighty-nine thousand, four hundred fifty-three".