2807685421 has 2 divisors, whose sum is σ = 2807685422. Its totient is φ = 2807685420.

The previous prime is 2807685383. The next prime is 2807685437. The reversal of 2807685421 is 1245867082.

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., 2071160100 + 736525321 = 45510^2 + 27139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2807685421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2807685481) 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, 1403842710 + 1403842711.

It is an arithmetic number, because the mean of its divisors is an integer number (1403842711).

Almost surely, 2^2807685421 is an apocalyptic number.

It is an amenable number.

2807685421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2807685421 is an equidigital number, since it uses as much as digits as its factorization.

2807685421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 2807685421 is about 52987.5968600200. The cubic root of 2807685421 is about 1410.7481268676.

The spelling of 2807685421 in words is "two billion, eight hundred seven million, six hundred eighty-five thousand, four hundred twenty-one".