881138879 has 2 divisors, whose sum is σ = 881138880. Its totient is φ = 881138878.

The previous prime is 881138837. The next prime is 881138891. The reversal of 881138879 is 978831188.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 881138879 - 2¹² = 881134783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 881138879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881438879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440569439 + 440569440.

It is an arithmetic number, because the mean of its divisors is an integer number (440569440).

Almost surely, 2^881138879 is an apocalyptic number.

881138879 is a deficient number, since it is larger than the sum of its proper divisors (1).

881138879 is an equidigital number, since it uses as much as digits as its factorization.

881138879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 53.

The square root of 881138879 is about 29683.9835433184. The cubic root of 881138879 is about 958.6971907381.

The spelling of 881138879 in words is "eight hundred eighty-one million, one hundred thirty-eight thousand, eight hundred seventy-nine".