881138837 has 2 divisors, whose sum is σ = 881138838. Its totient is φ = 881138836.

The previous prime is 881138807. The next prime is 881138879. The reversal of 881138837 is 738831188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 724363396 + 156775441 = 26914^2 + 12521^2 .

It is a cyclic number.

It is not a de Polignac number, because 881138837 - 2⁶ = 881138773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 881138791 and 881138800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881138807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440569418 + 440569419.

It is an arithmetic number, because the mean of its divisors is an integer number (440569419).

Almost surely, 2^881138837 is an apocalyptic number.

It is an amenable number.

881138837 is a deficient number, since it is larger than the sum of its proper divisors (1).

881138837 is an equidigital number, since it uses as much as digits as its factorization.

881138837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 47.

The square root of 881138837 is about 29683.9828358662. The cubic root of 881138837 is about 958.6971755058.

The spelling of 881138837 in words is "eight hundred eighty-one million, one hundred thirty-eight thousand, eight hundred thirty-seven".