12940642969 has 2 divisors, whose sum is σ = 12940642970. Its totient is φ = 12940642968.

The previous prime is 12940642931. The next prime is 12940643003. The reversal of 12940642969 is 96924604921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9525760000 + 3414882969 = 97600^2 + 58437^2 .

It is a cyclic number.

It is not a de Polignac number, because 12940642969 - 2¹⁵ = 12940610201 is a prime.

It is a super-2 number, since 2×12940642969² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12940640969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6470321484 + 6470321485.

It is an arithmetic number, because the mean of its divisors is an integer number (6470321485).

Almost surely, 2^12940642969 is an apocalyptic number.

It is an amenable number.

12940642969 is a deficient number, since it is larger than the sum of its proper divisors (1).

12940642969 is an equidigital number, since it uses as much as digits as its factorization.

12940642969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 12940642969 in words is "twelve billion, nine hundred forty million, six hundred forty-two thousand, nine hundred sixty-nine".