1943693745 has 16 divisors (see below), whose sum is σ = 3554183040. Its totient is φ = 888545664.

The previous prime is 1943693743. The next prime is 1943693779. The reversal of 1943693745 is 5473963491.

It is not a de Polignac number, because 1943693745 - 2¹ = 1943693743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1943693743) 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, 9255580 + ... + 9255789.

It is an arithmetic number, because the mean of its divisors is an integer number (222136440).

Almost surely, 2^1943693745 is an apocalyptic number.

1943693745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1943693745 is a deficient number, since it is larger than the sum of its proper divisors (1610489295).

1943693745 is a wasteful number, since it uses less digits than its factorization.

1943693745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18511384.

The product of its digits is 2449440, while the sum is 51.

The square root of 1943693745 is about 44087.3422310758. The cubic root of 1943693745 is about 1247.9847516988.

The spelling of 1943693745 in words is "one billion, nine hundred forty-three million, six hundred ninety-three thousand, seven hundred forty-five".