3869881 has 2 divisors, whose sum is σ = 3869882. Its totient is φ = 3869880.

The previous prime is 3869861. The next prime is 3869917. The reversal of 3869881 is 1889683.

It is a happy number.

3869881 is nontrivially palindromic in base 9.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3767481 + 102400 = 1941^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3869881 - 2⁵ = 3869849 is a prime.

It is a super-3 number, since 3×3869881³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

3869881 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (3869861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1934940 + 1934941.

It is an arithmetic number, because the mean of its divisors is an integer number (1934941).

Almost surely, 2^3869881 is an apocalyptic number.

It is an amenable number.

3869881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3869881 is an equidigital number, since it uses as much as digits as its factorization.

3869881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 3869881 is about 1967.2013115083. The cubic root of 3869881 is about 156.9998377214. Note that the first 3 decimals are identical.

The spelling of 3869881 in words is "three million, eight hundred sixty-nine thousand, eight hundred eighty-one".