881279449 has 2 divisors, whose sum is σ = 881279450. Its totient is φ = 881279448.

The previous prime is 881279411. The next prime is 881279533. The reversal of 881279449 is 944972188.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 838507849 + 42771600 = 28957^2 + 6540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881279449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 881279396 and 881279405.

It is not a weakly prime, because it can be changed into another prime (881279849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440639724 + 440639725.

It is an arithmetic number, because the mean of its divisors is an integer number (440639725).

Almost surely, 2^881279449 is an apocalyptic number.

It is an amenable number.

881279449 is a deficient number, since it is larger than the sum of its proper divisors (1).

881279449 is an equidigital number, since it uses as much as digits as its factorization.

881279449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The square root of 881279449 is about 29686.3512240895. The cubic root of 881279449 is about 958.7481690427.

The spelling of 881279449 in words is "eight hundred eighty-one million, two hundred seventy-nine thousand, four hundred forty-nine".