880779217 has 2 divisors, whose sum is σ = 880779218. Its totient is φ = 880779216.

The previous prime is 880779149. The next prime is 880779233. The reversal of 880779217 is 712977088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 676832256 + 203946961 = 26016^2 + 14281^2 .

It is a cyclic number.

It is not a de Polignac number, because 880779217 - 2²³ = 872390609 is a prime.

It is not a weakly prime, because it can be changed into another prime (880779247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440389608 + 440389609.

It is an arithmetic number, because the mean of its divisors is an integer number (440389609).

Almost surely, 2^880779217 is an apocalyptic number.

It is an amenable number.

880779217 is a deficient number, since it is larger than the sum of its proper divisors (1).

880779217 is an equidigital number, since it uses as much as digits as its factorization.

880779217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 49.

The square root of 880779217 is about 29677.9247421379. The cubic root of 880779217 is about 958.5667331065.

The spelling of 880779217 in words is "eight hundred eighty million, seven hundred seventy-nine thousand, two hundred seventeen".