1994968051 has 2 divisors, whose sum is σ = 1994968052. Its totient is φ = 1994968050.

The previous prime is 1994968049. The next prime is 1994968093. The reversal of 1994968051 is 1508694991.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1508694991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1994968051 - 2¹ = 1994968049 is a prime.

Together with 1994968049, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1994968051.

It is not a weakly prime, because it can be changed into another prime (1994968351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997484025 + 997484026.

It is an arithmetic number, because the mean of its divisors is an integer number (997484026).

Almost surely, 2^1994968051 is an apocalyptic number.

1994968051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994968051 is an equidigital number, since it uses as much as digits as its factorization.

1994968051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 52.

The square root of 1994968051 is about 44665.0652188038. The cubic root of 1994968051 is about 1258.8635194140.

The spelling of 1994968051 in words is "one billion, nine hundred ninety-four million, nine hundred sixty-eight thousand, fifty-one".