955639943 has 2 divisors, whose sum is σ = 955639944. Its totient is φ = 955639942.

The previous prime is 955639901. The next prime is 955639957. The reversal of 955639943 is 349936559.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 955639943 - 2⁶ = 955639879 is a prime.

It is a super-3 number, since 3×955639943³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (955639973) 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 as a sum of consecutive naturals, namely, 477819971 + 477819972.

It is an arithmetic number, because the mean of its divisors is an integer number (477819972).

Almost surely, 2^955639943 is an apocalyptic number.

955639943 is a deficient number, since it is larger than the sum of its proper divisors (1).

955639943 is an equidigital number, since it uses as much as digits as its factorization.

955639943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3936600, while the sum is 53.

The square root of 955639943 is about 30913.4265813416. The cubic root of 955639943 is about 984.9891151193.

The spelling of 955639943 in words is "nine hundred fifty-five million, six hundred thirty-nine thousand, nine hundred forty-three".