881989613 has 2 divisors, whose sum is σ = 881989614. Its totient is φ = 881989612.

The previous prime is 881989573. The next prime is 881989637. The reversal of 881989613 is 316989188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872729764 + 9259849 = 29542^2 + 3043^2 .

It is a cyclic number.

It is not a de Polignac number, because 881989613 - 2¹⁴ = 881973229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881989013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440994806 + 440994807.

It is an arithmetic number, because the mean of its divisors is an integer number (440994807).

Almost surely, 2^881989613 is an apocalyptic number.

It is an amenable number.

881989613 is a deficient number, since it is larger than the sum of its proper divisors (1).

881989613 is an equidigital number, since it uses as much as digits as its factorization.

881989613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 53.

The square root of 881989613 is about 29698.3099350788. The cubic root of 881989613 is about 959.0056301800.

The spelling of 881989613 in words is "eight hundred eighty-one million, nine hundred eighty-nine thousand, six hundred thirteen".