3940987 has 2 divisors, whose sum is σ = 3940988. Its totient is φ = 3940986.

The previous prime is 3940969. The next prime is 3941011. The reversal of 3940987 is 7890493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3940987 - 2¹¹ = 3938939 is a prime.

It is not a weakly prime, because it can be changed into another prime (3940967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970493 + 1970494.

It is an arithmetic number, because the mean of its divisors is an integer number (1970494).

Almost surely, 2^3940987 is an apocalyptic number.

3940987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3940987 is an equidigital number, since it uses as much as digits as its factorization.

3940987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 3940987 is about 1985.1919302677. The cubic root of 3940987 is about 157.9555902533.

The spelling of 3940987 in words is "three million, nine hundred forty thousand, nine hundred eighty-seven".