880783721 has 2 divisors, whose sum is σ = 880783722. Its totient is φ = 880783720.

The previous prime is 880783681. The next prime is 880783723. The reversal of 880783721 is 127387088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 441462121 + 439321600 = 21011^2 + 20960^2 .

It is a cyclic number.

It is not a de Polignac number, because 880783721 - 2¹⁰ = 880782697 is a prime.

Together with 880783723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (880783723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440391860 + 440391861.

It is an arithmetic number, because the mean of its divisors is an integer number (440391861).

Almost surely, 2^880783721 is an apocalyptic number.

It is an amenable number.

880783721 is a deficient number, since it is larger than the sum of its proper divisors (1).

880783721 is an equidigital number, since it uses as much as digits as its factorization.

880783721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 880783721 is about 29678.0006233574. Note that the first 3 decimals coincide. The cubic root of 880783721 is about 958.5683670298.

The spelling of 880783721 in words is "eight hundred eighty million, seven hundred eighty-three thousand, seven hundred twenty-one".