131928999989 has 2 divisors, whose sum is σ = 131928999990. Its totient is φ = 131928999988.

The previous prime is 131928999977. The next prime is 131929000033. The reversal of 131928999989 is 989999829131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117638710225 + 14290289764 = 342985^2 + 119542^2 .

It is a cyclic number.

It is not a de Polignac number, because 131928999989 - 2⁴ = 131928999973 is a prime.

It is a super-2 number, since 2×131928999989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131928999949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65964499994 + 65964499995.

It is an arithmetic number, because the mean of its divisors is an integer number (65964499995).

Almost surely, 2^131928999989 is an apocalyptic number.

It is an amenable number.

131928999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

131928999989 is an equidigital number, since it uses as much as digits as its factorization.

131928999989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204073344, while the sum is 77.

The spelling of 131928999989 in words is "one hundred thirty-one billion, nine hundred twenty-eight million, nine hundred ninety-nine thousand, nine hundred eighty-nine".