7471991747 has 8 divisors (see below), whose sum is σ = 8226047280. Its totient is φ = 6730400160.

The previous prime is 7471991731. The next prime is 7471991801.

It is a happy number.

7471991747 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 7471991747 - 2⁴ = 7471991731 is a prime.

It is a super-2 number, since 2×7471991747² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7471991692 and 7471991701.

It is not an unprimeable number, because it can be changed into a prime (7471991047) 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, 3114728 + ... + 3117125.

It is an arithmetic number, because the mean of its divisors is an integer number (1028255910).

Almost surely, 2^7471991747 is an apocalyptic number.

7471991747 is a deficient number, since it is larger than the sum of its proper divisors (754055533).

7471991747 is a wasteful number, since it uses less digits than its factorization.

7471991747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6231973.

The product of its digits is 3111696, while the sum is 56.

The square root of 7471991747 is about 86440.6834019722. The cubic root of 7471991747 is about 1954.9941454943.

The spelling of 7471991747 in words is "seven billion, four hundred seventy-one million, nine hundred ninety-one thousand, seven hundred forty-seven".