2868688421 has 2 divisors, whose sum is σ = 2868688422. Its totient is φ = 2868688420.

The previous prime is 2868688397. The next prime is 2868688429. The reversal of 2868688421 is 1248868682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2637952321 + 230736100 = 51361^2 + 15190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2868688421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2868688429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1434344210 + 1434344211.

It is an arithmetic number, because the mean of its divisors is an integer number (1434344211).

Almost surely, 2^2868688421 is an apocalyptic number.

It is an amenable number.

2868688421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2868688421 is an equidigital number, since it uses as much as digits as its factorization.

2868688421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2359296, while the sum is 53.

The square root of 2868688421 is about 53560.1383586712. The cubic root of 2868688421 is about 1420.8921889382.

The spelling of 2868688421 in words is "two billion, eight hundred sixty-eight million, six hundred eighty-eight thousand, four hundred twenty-one".