3919420681 has 24 divisors (see below), whose sum is σ = 4589373600. Its totient is φ = 3318166080.

The previous prime is 3919420679. The next prime is 3919420699. The reversal of 3919420681 is 1860249193.

It is a happy number.

It is not a de Polignac number, because 3919420681 - 2¹ = 3919420679 is a prime.

It is a super-2 number, since 2×3919420681² = 30723716949301007522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3919420621) 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 in 23 ways as a sum of consecutive naturals, for example, 225925 + ... + 242653.

It is an arithmetic number, because the mean of its divisors is an integer number (191223900).

Almost surely, 2^3919420681 is an apocalyptic number.

It is an amenable number.

3919420681 is a deficient number, since it is larger than the sum of its proper divisors (669952919).

3919420681 is a wasteful number, since it uses less digits than its factorization.

3919420681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16837 (or 16818 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 3919420681 is about 62605.2767823927. The cubic root of 3919420681 is about 1576.6693553663.

The spelling of 3919420681 in words is "three billion, nine hundred nineteen million, four hundred twenty thousand, six hundred eighty-one".