9862087421 has 2 divisors, whose sum is σ = 9862087422. Its totient is φ = 9862087420.

The previous prime is 9862087393. The next prime is 9862087423. The reversal of 9862087421 is 1247802689.

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., 8864222500 + 997864921 = 94150^2 + 31589^2 .

It is a cyclic number.

It is not a de Polignac number, because 9862087421 - 2²² = 9857893117 is a prime.

Together with 9862087423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9862087423) 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 as a sum of consecutive naturals, namely, 4931043710 + 4931043711.

It is an arithmetic number, because the mean of its divisors is an integer number (4931043711).

Almost surely, 2^9862087421 is an apocalyptic number.

It is an amenable number.

9862087421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9862087421 is an equidigital number, since it uses as much as digits as its factorization.

9862087421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 9862087421 is about 99308.0430831260. The cubic root of 9862087421 is about 2144.4846863713.

The spelling of 9862087421 in words is "nine billion, eight hundred sixty-two million, eighty-seven thousand, four hundred twenty-one".