3947407 has 2 divisors, whose sum is σ = 3947408. Its totient is φ = 3947406.

The previous prime is 3947401. The next prime is 3947413. The reversal of 3947407 is 7047493.

3947407 is nontrivially palindromic in base 9.

It is a balanced prime because it is at equal distance from previous prime (3947401) and next prime (3947413).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3947401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973703 + 1973704.

It is an arithmetic number, because the mean of its divisors is an integer number (1973704).

Almost surely, 2^3947407 is an apocalyptic number.

3947407 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947407 is an equidigital number, since it uses as much as digits as its factorization.

3947407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 3947407 is about 1986.8082443960. The cubic root of 3947407 is about 158.0413153719.

The spelling of 3947407 in words is "three million, nine hundred forty-seven thousand, four hundred seven".