7743946993 has 4 divisors (see below), whose sum is σ = 7744222708. Its totient is φ = 7743671280.

The previous prime is 7743946979. The next prime is 7743947017. The reversal of 7743946993 is 3996493477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3996493477 = 55337 ⋅72221.

It can be written as a sum of positive squares in 2 ways, for example, as 2958489664 + 4785457329 = 54392^2 + 69177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7743946993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7743946933) 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, 90246 + ... + 153727.

It is an arithmetic number, because the mean of its divisors is an integer number (1936055677).

Almost surely, 2^7743946993 is an apocalyptic number.

It is an amenable number.

7743946993 is a deficient number, since it is larger than the sum of its proper divisors (275715).

7743946993 is a wasteful number, since it uses less digits than its factorization.

7743946993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275714.

The product of its digits is 30862944, while the sum is 61.

The square root of 7743946993 is about 87999.6988233483. The cubic root of 7743946993 is about 1978.4304632179.

The spelling of 7743946993 in words is "seven billion, seven hundred forty-three million, nine hundred forty-six thousand, nine hundred ninety-three".