7748121347 has 4 divisors (see below), whose sum is σ = 7750552656. Its totient is φ = 7745690040.

The previous prime is 7748121341. The next prime is 7748121361. The reversal of 7748121347 is 7431218477.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7431218477 = 29 ⋅256248913.

It is a cyclic number.

It is not a de Polignac number, because 7748121347 - 2¹⁰ = 7748120323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7748121298 and 7748121307.

It is not an unprimeable number, because it can be changed into a prime (7748121341) 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, 1210868 + ... + 1217249.

It is an arithmetic number, because the mean of its divisors is an integer number (1937638164).

Almost surely, 2^7748121347 is an apocalyptic number.

7748121347 is a deficient number, since it is larger than the sum of its proper divisors (2431309).

7748121347 is a wasteful number, since it uses less digits than its factorization.

7748121347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431308.

The product of its digits is 263424, while the sum is 44.

The square root of 7748121347 is about 88023.4136295565. The cubic root of 7748121347 is about 1978.7858885857.

The spelling of 7748121347 in words is "seven billion, seven hundred forty-eight million, one hundred twenty-one thousand, three hundred forty-seven".