73987927109 has 2 divisors, whose sum is σ = 73987927110. Its totient is φ = 73987927108.

The previous prime is 73987927103. The next prime is 73987927133. The reversal of 73987927109 is 90172978937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63317656900 + 10670270209 = 251630^2 + 103297^2 .

It is an emirp because it is prime and its reverse (90172978937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73987927109 - 2⁴ = 73987927093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73987927103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36993963554 + 36993963555.

It is an arithmetic number, because the mean of its divisors is an integer number (36993963555).

Almost surely, 2^73987927109 is an apocalyptic number.

It is an amenable number.

73987927109 is a deficient number, since it is larger than the sum of its proper divisors (1).

73987927109 is an equidigital number, since it uses as much as digits as its factorization.

73987927109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12002256, while the sum is 62.

The spelling of 73987927109 in words is "seventy-three billion, nine hundred eighty-seven million, nine hundred twenty-seven thousand, one hundred nine".