3949418881 has 2 divisors, whose sum is σ = 3949418882. Its totient is φ = 3949418880.

The previous prime is 3949418843. The next prime is 3949418933. The reversal of 3949418881 is 1888149493.

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., 3870830656 + 78588225 = 62216^2 + 8865^2 .

It is a cyclic number.

It is not a de Polignac number, because 3949418881 - 2²⁹ = 3412547969 is a prime.

It is a super-2 number, since 2×3949418881² = 31195818995198584322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3949418821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974709440 + 1974709441.

It is an arithmetic number, because the mean of its divisors is an integer number (1974709441).

Almost surely, 2^3949418881 is an apocalyptic number.

It is an amenable number.

3949418881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949418881 is an equidigital number, since it uses as much as digits as its factorization.

3949418881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 55.

The square root of 3949418881 is about 62844.4021452985. The cubic root of 3949418881 is about 1580.6816053179.

The spelling of 3949418881 in words is "three billion, nine hundred forty-nine million, four hundred eighteen thousand, eight hundred eighty-one".