2130961993 has 2 divisors, whose sum is σ = 2130961994. Its totient is φ = 2130961992.

The previous prime is 2130961991. The next prime is 2130962011. The reversal of 2130961993 is 3991690312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1350709504 + 780252489 = 36752^2 + 27933^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130961993 - 2¹ = 2130961991 is a prime.

It is a super-2 number, since 2×2130961993² = 9081998031221064098, which contains 22 as substring.

Together with 2130961991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2130961991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065480996 + 1065480997.

It is an arithmetic number, because the mean of its divisors is an integer number (1065480997).

Almost surely, 2^2130961993 is an apocalyptic number.

It is an amenable number.

2130961993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130961993 is an equidigital number, since it uses as much as digits as its factorization.

2130961993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 2130961993 is about 46162.3438854658. The cubic root of 2130961993 is about 1286.8420226503.

The spelling of 2130961993 in words is "two billion, one hundred thirty million, nine hundred sixty-one thousand, nine hundred ninety-three".