7844620493 has 4 divisors (see below), whose sum is σ = 8011527360. Its totient is φ = 7677713628.

The previous prime is 7844620489. The next prime is 7844620499. The reversal of 7844620493 is 3940264487.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3940264487 = 191 ⋅20629657.

It is a cyclic number.

It is not a de Polignac number, because 7844620493 - 2² = 7844620489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 166906819 = 7844620493 / (7 + 8 + 4 + 4 + 6 + 2 + 0 + 4 + 9 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7844620499) 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, 83453363 + ... + 83453456.

It is an arithmetic number, because the mean of its divisors is an integer number (2002881840).

Almost surely, 2^7844620493 is an apocalyptic number.

It is an amenable number.

7844620493 is a deficient number, since it is larger than the sum of its proper divisors (166906867).

7844620493 is a wasteful number, since it uses less digits than its factorization.

7844620493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166906866.

The product of its (nonzero) digits is 1161216, while the sum is 47.

The square root of 7844620493 is about 88569.8622162189. The cubic root of 7844620493 is about 1986.9669621955.

The spelling of 7844620493 in words is "seven billion, eight hundred forty-four million, six hundred twenty thousand, four hundred ninety-three".