881669 has 2 divisors, whose sum is σ = 881670. Its totient is φ = 881668.

The previous prime is 881663. The next prime is 881681. The reversal of 881669 is 966188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744769 + 136900 = 863^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 881669 - 2¹² = 877573 is a prime.

It is a super-2 number, since 2×881669² = 1554680451122, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440834 + 440835.

It is an arithmetic number, because the mean of its divisors is an integer number (440835).

2⁸⁸¹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

881669 is a deficient number, since it is larger than the sum of its proper divisors (1).

881669 is an equidigital number, since it uses as much as digits as its factorization.

881669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 881669 is about 938.9723105609. The cubic root of 881669 is about 95.8889413038. Note that the first 3 decimals are identical.

The spelling of 881669 in words is "eight hundred eighty-one thousand, six hundred sixty-nine".