3981494401 has 8 divisors (see below), whose sum is σ = 4216803624. Its totient is φ = 3746307840.

The previous prime is 3981494389. The next prime is 3981494417. The reversal of 3981494401 is 1044941893.

It can be written as a sum of positive squares in 4 ways, for example, as 2240602225 + 1740892176 = 47335^2 + 41724^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3981494401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3981494801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40971 + ... + 98191.

It is an arithmetic number, because the mean of its divisors is an integer number (527100453).

Almost surely, 2^3981494401 is an apocalyptic number.

It is an amenable number.

3981494401 is a deficient number, since it is larger than the sum of its proper divisors (235309223).

3981494401 is a wasteful number, since it uses less digits than its factorization.

3981494401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61331.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 3981494401 is about 63099.0839949361. The cubic root of 3981494401 is about 1584.9492831745.

The spelling of 3981494401 in words is "three billion, nine hundred eighty-one million, four hundred ninety-four thousand, four hundred one".