2699931709421 has 2 divisors, whose sum is σ = 2699931709422. Its totient is φ = 2699931709420.

The previous prime is 2699931709379. The next prime is 2699931709483. The reversal of 2699931709421 is 1249071399962.

It is an a-pointer prime, because the next prime (2699931709483) can be obtained adding 2699931709421 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1535505114025 + 1164426595396 = 1239155^2 + 1079086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2699931709421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2699931709621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1349965854710 + 1349965854711.

It is an arithmetic number, because the mean of its divisors is an integer number (1349965854711).

Almost surely, 2^{2699931709421} is an apocalyptic number.

It is an amenable number.

2699931709421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2699931709421 is an equidigital number, since it uses as much as digits as its factorization.

2699931709421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 2699931709421 in words is "two trillion, six hundred ninety-nine billion, nine hundred thirty-one million, seven hundred nine thousand, four hundred twenty-one".