79828977 has 4 divisors (see below), whose sum is σ = 106438640. Its totient is φ = 53219316.

The previous prime is 79828949. The next prime is 79828981. The reversal of 79828977 is 77982897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 79828977 - 2⁷ = 79828849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79828477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13304827 + ... + 13304832.

It is an arithmetic number, because the mean of its divisors is an integer number (26609660).

Almost surely, 2^79828977 is an apocalyptic number.

It is an amenable number.

79828977 is a deficient number, since it is larger than the sum of its proper divisors (26609663).

79828977 is a wasteful number, since it uses less digits than its factorization.

79828977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26609662.

The product of its digits is 3556224, while the sum is 57.

The square root of 79828977 is about 8934.7063186207. The cubic root of 79828977 is about 430.5796707082.

The spelling of 79828977 in words is "seventy-nine million, eight hundred twenty-eight thousand, nine hundred seventy-seven".