79977105 has 64 divisors (see below), whose sum is σ = 154560000. Its totient is φ = 39004416.

The previous prime is 79977103. The next prime is 79977109. The reversal of 79977105 is 50177997.

It is not a de Polignac number, because 79977105 - 2¹ = 79977103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79977103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 349131 + ... + 349359.

It is an arithmetic number, because the mean of its divisors is an integer number (2415000).

Almost surely, 2^79977105 is an apocalyptic number.

It is an amenable number.

79977105 is a deficient number, since it is larger than the sum of its proper divisors (74582895).

79977105 is a wasteful number, since it uses less digits than its factorization.

79977105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 138915, while the sum is 45.

The square root of 79977105 is about 8942.9919490068. The cubic root of 79977105 is about 430.8458292660.

The spelling of 79977105 in words is "seventy-nine million, nine hundred seventy-seven thousand, one hundred five".