1966787 has 2 divisors, whose sum is σ = 1966788. Its totient is φ = 1966786.

The previous prime is 1966697. The next prime is 1966793. The reversal of 1966787 is 7876691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1966787 is a prime.

It is a super-2 number, since 2×1966787² = 7736502206738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1966387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983393 + 983394.

It is an arithmetic number, because the mean of its divisors is an integer number (983394).

2^1966787 is an apocalyptic number.

1966787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966787 is an equidigital number, since it uses as much as digits as its factorization.

1966787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 1966787 is about 1402.4218338289. The cubic root of 1966787 is about 125.2907790558.

The spelling of 1966787 in words is "one million, nine hundred sixty-six thousand, seven hundred eighty-seven".