889878013 has 2 divisors, whose sum is σ = 889878014. Its totient is φ = 889878012.

The previous prime is 889877983. The next prime is 889878029. The reversal of 889878013 is 310878988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708517924 + 181360089 = 26618^2 + 13467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889878013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889878313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444939006 + 444939007.

It is an arithmetic number, because the mean of its divisors is an integer number (444939007).

Almost surely, 2^889878013 is an apocalyptic number.

It is an amenable number.

889878013 is a deficient number, since it is larger than the sum of its proper divisors (1).

889878013 is an equidigital number, since it uses as much as digits as its factorization.

889878013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 889878013 is about 29830.8232035256. The cubic root of 889878013 is about 961.8562222902.

The spelling of 889878013 in words is "eight hundred eighty-nine million, eight hundred seventy-eight thousand, thirteen".