75947009989 has 2 divisors, whose sum is σ = 75947009990. Its totient is φ = 75947009988.

The previous prime is 75947009921. The next prime is 75947010049. The reversal of 75947009989 is 98990074957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75945989889 + 1020100 = 275583^2 + 1010^2 .

It is an emirp because it is prime and its reverse (98990074957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75947009989 - 2¹³ = 75947001797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75947009689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37973504994 + 37973504995.

It is an arithmetic number, because the mean of its divisors is an integer number (37973504995).

Almost surely, 2^75947009989 is an apocalyptic number.

It is an amenable number.

75947009989 is a deficient number, since it is larger than the sum of its proper divisors (1).

75947009989 is an equidigital number, since it uses as much as digits as its factorization.

75947009989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51438240, while the sum is 67.

The spelling of 75947009989 in words is "seventy-five billion, nine hundred forty-seven million, nine thousand, nine hundred eighty-nine".