79169261 has 2 divisors, whose sum is σ = 79169262. Its totient is φ = 79169260.

The previous prime is 79169249. The next prime is 79169317. The reversal of 79169261 is 16296197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49084036 + 30085225 = 7006^2 + 5485^2 .

It is an emirp because it is prime and its reverse (16296197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79169261 - 2¹⁸ = 78907117 is a prime.

It is a super-2 number, since 2×79169261² = 12535543774572242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79169161) 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 as a sum of consecutive naturals, namely, 39584630 + 39584631.

It is an arithmetic number, because the mean of its divisors is an integer number (39584631).

Almost surely, 2^79169261 is an apocalyptic number.

It is an amenable number.

79169261 is a deficient number, since it is larger than the sum of its proper divisors (1).

79169261 is an equidigital number, since it uses as much as digits as its factorization.

79169261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 79169261 is about 8897.7109977791. The cubic root of 79169261 is about 429.3902679634.

The spelling of 79169261 in words is "seventy-nine million, one hundred sixty-nine thousand, two hundred sixty-one".