1940987 has 2 divisors, whose sum is σ = 1940988. Its totient is φ = 1940986.

The previous prime is 1940971. The next prime is 1941013. The reversal of 1940987 is 7890491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1940987 - 2⁴ = 1940971 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1940987.

It is not a weakly prime, because it can be changed into another prime (1940957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970493 + 970494.

It is an arithmetic number, because the mean of its divisors is an integer number (970494).

2^1940987 is an apocalyptic number.

1940987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940987 is an equidigital number, since it uses as much as digits as its factorization.

1940987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1940987 is about 1393.1930950159. The cubic root of 1940987 is about 124.7405177243.

The spelling of 1940987 in words is "one million, nine hundred forty thousand, nine hundred eighty-seven".