3990471 has 4 divisors (see below), whose sum is σ = 5320632. Its totient is φ = 2660312.

The previous prime is 3990463. The next prime is 3990473. The reversal of 3990471 is 1740993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1740993 = 3 ⋅580331.

It is a cyclic number.

It is not a de Polignac number, because 3990471 - 2³ = 3990463 is a prime.

It is a super-3 number, since 3×3990471³ (a number of 21 digits) contains 333 as substring.

It is a D-number.

3990471 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665076 + ... + 665081.

It is an arithmetic number, because the mean of its divisors is an integer number (1330158).

Almost surely, 2^3990471 is an apocalyptic number.

3990471 is a deficient number, since it is larger than the sum of its proper divisors (1330161).

3990471 is a wasteful number, since it uses less digits than its factorization.

3990471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330160.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 3990471 is about 1997.6163295288. The cubic root of 3990471 is about 158.6139520958.

The spelling of 3990471 in words is "three million, nine hundred ninety thousand, four hundred seventy-one".