79209161 has 8 divisors (see below), whose sum is σ = 80537160. Its totient is φ = 77887872.

The previous prime is 79209131. The next prime is 79209173. The reversal of 79209161 is 16190297.

It can be written as a sum of positive squares in 4 ways, for example, as 29365561 + 49843600 = 5419^2 + 7060^2 .

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 79209161 - 2¹⁴ = 79192777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79209131) 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, 25775 + ... + 28683.

It is an arithmetic number, because the mean of its divisors is an integer number (10067145).

Almost surely, 2^79209161 is an apocalyptic number.

It is an amenable number.

79209161 is a deficient number, since it is larger than the sum of its proper divisors (1327999).

79209161 is a wasteful number, since it uses less digits than its factorization.

79209161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 79209161 is about 8899.9528650437. The cubic root of 79209161 is about 429.4623910496.

The spelling of 79209161 in words is "seventy-nine million, two hundred nine thousand, one hundred sixty-one".