7939553989 has 2 divisors, whose sum is σ = 7939553990. Its totient is φ = 7939553988.

The previous prime is 7939553981. The next prime is 7939554001. The reversal of 7939553989 is 9893559397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5883657025 + 2055896964 = 76705^2 + 45342^2 .

It is a cyclic number.

It is not a de Polignac number, because 7939553989 - 2³ = 7939553981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7939553981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3969776994 + 3969776995.

It is an arithmetic number, because the mean of its divisors is an integer number (3969776995).

Almost surely, 2^7939553989 is an apocalyptic number.

It is an amenable number.

7939553989 is a deficient number, since it is larger than the sum of its proper divisors (1).

7939553989 is an equidigital number, since it uses as much as digits as its factorization.

7939553989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82668600, while the sum is 67.

The square root of 7939553989 is about 89104.1749246353. The cubic root of 7939553989 is about 1994.9500923648.

The spelling of 7939553989 in words is "seven billion, nine hundred thirty-nine million, five hundred fifty-three thousand, nine hundred eighty-nine".