7638972293 has 4 divisors (see below), whose sum is σ = 7648855308. Its totient is φ = 7629089280.

The previous prime is 7638972247. The next prime is 7638972301. The reversal of 7638972293 is 3922798367.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3922798367 = 43 ⋅91227869.

It can be written as a sum of positive squares in 2 ways, for example, as 3462969409 + 4176002884 = 58847^2 + 64622^2 .

It is a cyclic number.

It is not a de Polignac number, because 7638972293 - 2¹⁰ = 7638971269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7638972223) 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, 4940348 + ... + 4941893.

It is an arithmetic number, because the mean of its divisors is an integer number (1912213827).

Almost surely, 2^7638972293 is an apocalyptic number.

It is an amenable number.

7638972293 is a deficient number, since it is larger than the sum of its proper divisors (9883015).

7638972293 is an equidigital number, since it uses as much as digits as its factorization.

7638972293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9883014.

The product of its digits is 6858432, while the sum is 56.

The square root of 7638972293 is about 87401.2144824087. The cubic root of 7638972293 is about 1969.4500851130.

The spelling of 7638972293 in words is "seven billion, six hundred thirty-eight million, nine hundred seventy-two thousand, two hundred ninety-three".