79078261 has 2 divisors, whose sum is σ = 79078262. Its totient is φ = 79078260.

The previous prime is 79078249. The next prime is 79078283. The reversal of 79078261 is 16287097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68062500 + 11015761 = 8250^2 + 3319^2 .

It is a cyclic number.

It is not a de Polignac number, because 79078261 - 2¹¹ = 79076213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79078211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39539130 + 39539131.

It is an arithmetic number, because the mean of its divisors is an integer number (39539131).

Almost surely, 2^79078261 is an apocalyptic number.

It is an amenable number.

79078261 is a deficient number, since it is larger than the sum of its proper divisors (1).

79078261 is an equidigital number, since it uses as much as digits as its factorization.

79078261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 79078261 is about 8892.5958527305. The cubic root of 79078261 is about 429.2256860088.

The spelling of 79078261 in words is "seventy-nine million, seventy-eight thousand, two hundred sixty-one".