1945973689 has 16 divisors (see below), whose sum is σ = 2197883520. Its totient is φ = 1706664960.

The previous prime is 1945973677. The next prime is 1945973699. The reversal of 1945973689 is 9863795491.

It is not a de Polignac number, because 1945973689 - 2²¹ = 1943876537 is a prime.

It is a Duffinian number.

Its product of digits (14696640) is a multiple of the sum of its prime divisors (5040).

It is not an unprimeable number, because it can be changed into a prime (1945973699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672604 + ... + 675490.

It is an arithmetic number, because the mean of its divisors is an integer number (137367720).

Almost surely, 2^1945973689 is an apocalyptic number.

It is an amenable number.

1945973689 is a deficient number, since it is larger than the sum of its proper divisors (251909831).

1945973689 is a wasteful number, since it uses less digits than its factorization.

1945973689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040.

The product of its digits is 14696640, while the sum is 61.

The square root of 1945973689 is about 44113.1917797840. The cubic root of 1945973689 is about 1248.4725211938.

The spelling of 1945973689 in words is "one billion, nine hundred forty-five million, nine hundred seventy-three thousand, six hundred eighty-nine".