7920549779 has 8 divisors (see below), whose sum is σ = 8358429840. Its totient is φ = 7484770656.

The previous prime is 7920549761. The next prime is 7920549827. The reversal of 7920549779 is 9779450297.

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

It is a cyclic number.

It is not a de Polignac number, because 7920549779 - 2⁸ = 7920549523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7920549079) 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, 517484 + ... + 532569.

It is an arithmetic number, because the mean of its divisors is an integer number (1044803730).

Almost surely, 2^7920549779 is an apocalyptic number.

7920549779 is a deficient number, since it is larger than the sum of its proper divisors (437880061).

7920549779 is a wasteful number, since it uses less digits than its factorization.

7920549779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050469.

The product of its (nonzero) digits is 10001880, while the sum is 59.

The square root of 7920549779 is about 88997.4706325972. The cubic root of 7920549779 is about 1993.3571086756.

The spelling of 7920549779 in words is "seven billion, nine hundred twenty million, five hundred forty-nine thousand, seven hundred seventy-nine".