3947229 has 24 divisors (see below), whose sum is σ = 6700512. Its totient is φ = 2207520.

The previous prime is 3947227. The next prime is 3947233. The reversal of 3947229 is 9227493.

It is not a de Polignac number, because 3947229 - 2¹ = 3947227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3947193 and 3947202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 247 + ... + 2820.

It is an arithmetic number, because the mean of its divisors is an integer number (279188).

Almost surely, 2^3947229 is an apocalyptic number.

3947229 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3947229 is a deficient number, since it is larger than the sum of its proper divisors (2753283).

3947229 is a wasteful number, since it uses less digits than its factorization.

3947229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097 (or 3094 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 3947229 is about 1986.7634484256. The cubic root of 3947229 is about 158.0389398228.

The spelling of 3947229 in words is "three million, nine hundred forty-seven thousand, two hundred twenty-nine".