7939248477 has 8 divisors (see below), whose sum is σ = 11142804960. Its totient is φ = 5014262160.

The previous prime is 7939248469. The next prime is 7939248497. The reversal of 7939248477 is 7748429397.

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

It is not a de Polignac number, because 7939248477 - 2³ = 7939248469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7939248477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7939248407) 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 7 ways as a sum of consecutive naturals, for example, 69642474 + ... + 69642587.

It is an arithmetic number, because the mean of its divisors is an integer number (1392850620).

Almost surely, 2^7939248477 is an apocalyptic number.

It is an amenable number.

7939248477 is a deficient number, since it is larger than the sum of its proper divisors (3203556483).

7939248477 is a wasteful number, since it uses less digits than its factorization.

7939248477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139285083.

The product of its digits is 21337344, while the sum is 60.

The square root of 7939248477 is about 89102.4605552507. The cubic root of 7939248477 is about 1994.9245036474.

The spelling of 7939248477 in words is "seven billion, nine hundred thirty-nine million, two hundred forty-eight thousand, four hundred seventy-seven".