3987407 has 2 divisors, whose sum is σ = 3987408. Its totient is φ = 3987406.

The previous prime is 3987353. The next prime is 3987409. The reversal of 3987407 is 7047893.

It is a strong prime.

It is an emirp because it is prime and its reverse (7047893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3987407 is a prime.

Together with 3987409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3987409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993703 + 1993704.

It is an arithmetic number, because the mean of its divisors is an integer number (1993704).

Almost surely, 2^3987407 is an apocalyptic number.

3987407 is a deficient number, since it is larger than the sum of its proper divisors (1).

3987407 is an equidigital number, since it uses as much as digits as its factorization.

3987407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 3987407 is about 1996.8492682223. The cubic root of 3987407 is about 158.5733455618.

The spelling of 3987407 in words is "three million, nine hundred eighty-seven thousand, four hundred seven".