880978921 has 2 divisors, whose sum is σ = 880978922. Its totient is φ = 880978920.

The previous prime is 880978919. The next prime is 880978927. The reversal of 880978921 is 129879088.

880978921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717650521 + 163328400 = 26789^2 + 12780^2 .

It is a cyclic number.

It is not a de Polignac number, because 880978921 - 2¹ = 880978919 is a prime.

It is a super-2 number, since 2×880978921² = 1552247718492648482, which contains 22 as substring.

Together with 880978919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (880978927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440489460 + 440489461.

It is an arithmetic number, because the mean of its divisors is an integer number (440489461).

Almost surely, 2^880978921 is an apocalyptic number.

It is an amenable number.

880978921 is a deficient number, since it is larger than the sum of its proper divisors (1).

880978921 is an equidigital number, since it uses as much as digits as its factorization.

880978921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 880978921 is about 29681.2890724106. The cubic root of 880978921 is about 958.6391746980.

The spelling of 880978921 in words is "eight hundred eighty million, nine hundred seventy-eight thousand, nine hundred twenty-one".