1994195087 has 2 divisors, whose sum is σ = 1994195088. Its totient is φ = 1994195086.

The previous prime is 1994195069. The next prime is 1994195107. The reversal of 1994195087 is 7805914991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1994195087 - 2¹⁶ = 1994129551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994195017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997097543 + 997097544.

It is an arithmetic number, because the mean of its divisors is an integer number (997097544).

Almost surely, 2^1994195087 is an apocalyptic number.

1994195087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994195087 is an equidigital number, since it uses as much as digits as its factorization.

1994195087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 53.

The square root of 1994195087 is about 44656.4114881615. The cubic root of 1994195087 is about 1258.7009133210.

The spelling of 1994195087 in words is "one billion, nine hundred ninety-four million, one hundred ninety-five thousand, eighty-seven".