1945946903 has 2 divisors, whose sum is σ = 1945946904. Its totient is φ = 1945946902.

The previous prime is 1945946857. The next prime is 1945946917. The reversal of 1945946903 is 3096495491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1945946903 - 2⁶ = 1945946839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945946953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972973451 + 972973452.

It is an arithmetic number, because the mean of its divisors is an integer number (972973452).

Almost surely, 2^1945946903 is an apocalyptic number.

1945946903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945946903 is an equidigital number, since it uses as much as digits as its factorization.

1945946903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 1945946903 is about 44112.8881734125. Note that the first 3 decimals coincide. The cubic root of 1945946903 is about 1248.4667928295.

The spelling of 1945946903 in words is "one billion, nine hundred forty-five million, nine hundred forty-six thousand, nine hundred three".