1994459087 has 2 divisors, whose sum is σ = 1994459088. Its totient is φ = 1994459086.

The previous prime is 1994459009. The next prime is 1994459107. The reversal of 1994459087 is 7809544991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1994459087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994449087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997229543 + 997229544.

It is an arithmetic number, because the mean of its divisors is an integer number (997229544).

Almost surely, 2^1994459087 is an apocalyptic number.

1994459087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994459087 is an equidigital number, since it uses as much as digits as its factorization.

1994459087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The square root of 1994459087 is about 44659.3672928760. The cubic root of 1994459087 is about 1258.7564549245.

The spelling of 1994459087 in words is "one billion, nine hundred ninety-four million, four hundred fifty-nine thousand, eighty-seven".