8398613 has 4 divisors (see below), whose sum is σ = 8669568. Its totient is φ = 8127660.

The previous prime is 8398601. The next prime is 8398619. The reversal of 8398613 is 3168938.

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: 3168938 = 2 ⋅1584469.

It is a cyclic number.

It is not a de Polignac number, because 8398613 - 2¹⁴ = 8382229 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 (8398619) 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, 135431 + ... + 135492.

It is an arithmetic number, because the mean of its divisors is an integer number (2167392).

Almost surely, 2^8398613 is an apocalyptic number.

It is an amenable number.

8398613 is a deficient number, since it is larger than the sum of its proper divisors (270955).

8398613 is a wasteful number, since it uses less digits than its factorization.

8398613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270954.

The product of its digits is 31104, while the sum is 38.

The square root of 8398613 is about 2898.0360591269. The cubic root of 8398613 is about 203.2680823205.

The spelling of 8398613 in words is "eight million, three hundred ninety-eight thousand, six hundred thirteen".