7957389389 has 2 divisors, whose sum is σ = 7957389390. Its totient is φ = 7957389388.

The previous prime is 7957389367. The next prime is 7957389409. The reversal of 7957389389 is 9839837597.

7957389389 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7453386889 + 504002500 = 86333^2 + 22450^2 .

It is a cyclic number.

It is not a de Polignac number, because 7957389389 - 2⁸ = 7957389133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7957389329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3978694694 + 3978694695.

It is an arithmetic number, because the mean of its divisors is an integer number (3978694695).

Almost surely, 2^7957389389 is an apocalyptic number.

It is an amenable number.

7957389389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7957389389 is an equidigital number, since it uses as much as digits as its factorization.

7957389389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 68.

The square root of 7957389389 is about 89204.2005120835. The cubic root of 7957389389 is about 1996.4427926389.

The spelling of 7957389389 in words is "seven billion, nine hundred fifty-seven million, three hundred eighty-nine thousand, three hundred eighty-nine".