3981969 has 12 divisors (see below), whose sum is σ = 5850000. Its totient is φ = 2609304.

The previous prime is 3981959. The next prime is 3981973. The reversal of 3981969 is 9691893.

It is not a de Polignac number, because 3981969 - 2⁴ = 3981953 is a prime.

It is a super-2 number, since 2×3981969² = 31712154233922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3981959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3219 + ... + 4280.

It is an arithmetic number, because the mean of its divisors is an integer number (487500).

Almost surely, 2^3981969 is an apocalyptic number.

It is an amenable number.

3981969 is a deficient number, since it is larger than the sum of its proper divisors (1868031).

3981969 is a wasteful number, since it uses less digits than its factorization.

3981969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564 (or 7561 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 3981969 is about 1995.4871585655. The cubic root of 3981969 is about 158.5012256636.

It can be divided in two parts, 3981 and 969, that added together give a triangular number (4950 = T₉₉).

The spelling of 3981969 in words is "three million, nine hundred eighty-one thousand, nine hundred sixty-nine".