3902881 has 2 divisors, whose sum is σ = 3902882. Its totient is φ = 3902880.

The previous prime is 3902879. The next prime is 3902887. The reversal of 3902881 is 1882093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2692881 + 1210000 = 1641^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 3902881 - 2¹ = 3902879 is a prime.

It is a super-2 number, since 2×3902881² = 30464960200322, which contains 22 as substring.

Together with 3902879, it forms a pair of twin primes.

3902881 is a lucky number.

It is equal to p₂₇₆₇₉₀ and since 3902881 and 276790 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (3902887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1951440 + 1951441.

It is an arithmetic number, because the mean of its divisors is an integer number (1951441).

Almost surely, 2^3902881 is an apocalyptic number.

It is an amenable number.

3902881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3902881 is an equidigital number, since it uses as much as digits as its factorization.

3902881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 3902881 is about 1975.5710566821. The cubic root of 3902881 is about 157.4448416913. Note that the first 3 decimals are identical.

The spelling of 3902881 in words is "three million, nine hundred two thousand, eight hundred eighty-one".