79490177 has 4 divisors (see below), whose sum is σ = 85604820. Its totient is φ = 73375536.

The previous prime is 79490149. The next prime is 79490209. The reversal of 79490177 is 77109497.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77109497 = 307 ⋅251171.

It can be written as a sum of positive squares in 2 ways, for example, as 6370576 + 73119601 = 2524^2 + 8551^2 .

It is not a de Polignac number, because 79490177 - 2¹⁰ = 79489153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79490777) 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, 3057302 + ... + 3057327.

It is an arithmetic number, because the mean of its divisors is an integer number (21401205).

Almost surely, 2^79490177 is an apocalyptic number.

It is an amenable number.

79490177 is a deficient number, since it is larger than the sum of its proper divisors (6114643).

79490177 is a wasteful number, since it uses less digits than its factorization.

79490177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114642.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 79490177 is about 8915.7263865599. The cubic root of 79490177 is about 429.9696697554.

The spelling of 79490177 in words is "seventy-nine million, four hundred ninety thousand, one hundred seventy-seven".