6225639493 has 4 divisors (see below), whose sum is σ = 6225943168. Its totient is φ = 6225335820.

The previous prime is 6225639487. The next prime is 6225639523. The reversal of 6225639493 is 3949365226.

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 a de Polignac number, because none of the positive numbers 2^k-6225639493 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 (6225639193) 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, 118671 + ... + 162892.

It is an arithmetic number, because the mean of its divisors is an integer number (1556485792).

Almost surely, 2^6225639493 is an apocalyptic number.

It is an amenable number.

6225639493 is a deficient number, since it is larger than the sum of its proper divisors (303675).

6225639493 is a wasteful number, since it uses less digits than its factorization.

6225639493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303674.

The product of its digits is 2099520, while the sum is 49.

The square root of 6225639493 is about 78902.7217084430. The cubic root of 6225639493 is about 1839.6194365944.

The spelling of 6225639493 in words is "six billion, two hundred twenty-five million, six hundred thirty-nine thousand, four hundred ninety-three".