7948881331 has 4 divisors (see below), whose sum is σ = 7974277432. Its totient is φ = 7923485232.

The previous prime is 7948881319. The next prime is 7948881341. The reversal of 7948881331 is 1331888497.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7948881331 - 2⁵ = 7948881299 is a prime.

It is a super-2 number, since 2×7948881331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7948881341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12697581 + ... + 12698206.

It is an arithmetic number, because the mean of its divisors is an integer number (1993569358).

Almost surely, 2^7948881331 is an apocalyptic number.

7948881331 is a deficient number, since it is larger than the sum of its proper divisors (25396101).

7948881331 is a wasteful number, since it uses less digits than its factorization.

7948881331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25396100.

The product of its digits is 1161216, while the sum is 52.

The square root of 7948881331 is about 89156.4990956913. The cubic root of 7948881331 is about 1995.7310052418.

The spelling of 7948881331 in words is "seven billion, nine hundred forty-eight million, eight hundred eighty-one thousand, three hundred thirty-one".