1945012917 has 12 divisors (see below), whose sum is σ = 2711009504. Its totient is φ = 1240297080.

The previous prime is 1945012889. The next prime is 1945012931. The reversal of 1945012917 is 7192105491.

It is not a de Polignac number, because 1945012917 - 2⁸ = 1945012661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1945012117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611209 + ... + 614382.

Almost surely, 2^1945012917 is an apocalyptic number.

It is an amenable number.

1945012917 is a deficient number, since it is larger than the sum of its proper divisors (765996587).

1945012917 is a wasteful number, since it uses less digits than its factorization.

1945012917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225640 (or 1225617 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1945012917 is about 44102.3005862506. The cubic root of 1945012917 is about 1248.2670208302.

The spelling of 1945012917 in words is "one billion, nine hundred forty-five million, twelve thousand, nine hundred seventeen".