7638013 has 8 divisors (see below), whose sum is σ = 7866936. Its totient is φ = 7411200.

The previous prime is 7638011. The next prime is 7638023. The reversal of 7638013 is 3108367.

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 7634169 = 62^2 + 2763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7638013 - 2¹ = 7638011 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 (7638011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9495 + ... + 10267.

It is an arithmetic number, because the mean of its divisors is an integer number (983367).

Almost surely, 2^7638013 is an apocalyptic number.

It is an amenable number.

7638013 is a deficient number, since it is larger than the sum of its proper divisors (228923).

7638013 is a wasteful number, since it uses less digits than its factorization.

7638013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7638013 is about 2763.6955331585. The cubic root of 7638013 is about 196.9367641267.

The spelling of 7638013 in words is "seven million, six hundred thirty-eight thousand, thirteen".