3928247 has 2 divisors, whose sum is σ = 3928248. Its totient is φ = 3928246.

The previous prime is 3928229. The next prime is 3928259. The reversal of 3928247 is 7428293.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3928247 - 2¹⁶ = 3862711 is a prime.

It is a super-2 number, since 2×3928247² = 30862248986018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964123 + 1964124.

It is an arithmetic number, because the mean of its divisors is an integer number (1964124).

Almost surely, 2^3928247 is an apocalyptic number.

3928247 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928247 is an equidigital number, since it uses as much as digits as its factorization.

3928247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 3928247 is about 1981.9805750814. The cubic root of 3928247 is about 157.7851992182.

The spelling of 3928247 in words is "three million, nine hundred twenty-eight thousand, two hundred forty-seven".