3906247 has 2 divisors, whose sum is σ = 3906248. Its totient is φ = 3906246.

The previous prime is 3906187. The next prime is 3906263. The reversal of 3906247 is 7426093.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3906247 - 2¹⁵ = 3873479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3906547) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953123 + 1953124.

It is an arithmetic number, because the mean of its divisors is an integer number (1953124).

Almost surely, 2^3906247 is an apocalyptic number.

3906247 is a deficient number, since it is larger than the sum of its proper divisors (1).

3906247 is an equidigital number, since it uses as much as digits as its factorization.

3906247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 3906247 is about 1976.4227786585. The cubic root of 3906247 is about 157.4900909194.

The spelling of 3906247 in words is "three million, nine hundred six thousand, two hundred forty-seven".