1943349957 has 6 divisors (see below), whose sum is σ = 2807061062. Its totient is φ = 1295566632.

The previous prime is 1943349913. The next prime is 1943349997. The reversal of 1943349957 is 7599433491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1304220996 + 639128961 = 36114^2 + 25281^2 .

It is not a de Polignac number, because 1943349957 - 2¹¹ = 1943347909 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 (1943349907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107963878 + ... + 107963895.

Almost surely, 2^1943349957 is an apocalyptic number.

It is an amenable number.

1943349957 is a deficient number, since it is larger than the sum of its proper divisors (863711105).

1943349957 is a wasteful number, since it uses less digits than its factorization.

1943349957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215927779 (or 215927776 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The square root of 1943349957 is about 44083.4431164354. The cubic root of 1943349957 is about 1247.9111688653.

The spelling of 1943349957 in words is "one billion, nine hundred forty-three million, three hundred forty-nine thousand, nine hundred fifty-seven".