6398653 has 4 divisors (see below), whose sum is σ = 6462108. Its totient is φ = 6335200.

The previous prime is 6398633. The next prime is 6398671. The reversal of 6398653 is 3568936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5938969 + 459684 = 2437^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 6398653 - 2⁵ = 6398621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398633) 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, 31576 + ... + 31777.

It is an arithmetic number, because the mean of its divisors is an integer number (1615527).

Almost surely, 2^6398653 is an apocalyptic number.

It is an amenable number.

6398653 is a deficient number, since it is larger than the sum of its proper divisors (63455).

6398653 is a wasteful number, since it uses less digits than its factorization.

6398653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63454.

The product of its digits is 116640, while the sum is 40.

The square root of 6398653 is about 2529.5558898747. Note that the first 3 decimals coincide. The cubic root of 6398653 is about 185.6505269719.

The spelling of 6398653 in words is "six million, three hundred ninety-eight thousand, six hundred fifty-three".