2139304068497 has 4 divisors (see below), whose sum is σ = 2139314024676. Its totient is φ = 2139294112320.

The previous prime is 2139304068493. The next prime is 2139304068509. The reversal of 2139304068497 is 7948604039312.

It is a Cunningham number, because it is equal to 1462636²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 520019823376 + 1619284245121 = 721124^2 + 1272511^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139304068497 - 2² = 2139304068493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139304068493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4648508 + ... + 5087949.

It is an arithmetic number, because the mean of its divisors is an integer number (534828506169).

Almost surely, 2^{2139304068497} is an apocalyptic number.

It is an amenable number.

2139304068497 is a deficient number, since it is larger than the sum of its proper divisors (9956179).

2139304068497 is an equidigital number, since it uses as much as digits as its factorization.

2139304068497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9956178.

The product of its (nonzero) digits is 7838208, while the sum is 56.

The spelling of 2139304068497 in words is "two trillion, one hundred thirty-nine billion, three hundred four million, sixty-eight thousand, four hundred ninety-seven".