84417137251 has 2 divisors, whose sum is σ = 84417137252. Its totient is φ = 84417137250.

The previous prime is 84417137249. The next prime is 84417137257. The reversal of 84417137251 is 15273171448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84417137251 - 2¹ = 84417137249 is a prime.

Together with 84417137249, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 84417137198 and 84417137207.

It is not a weakly prime, because it can be changed into another prime (84417137257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42208568625 + 42208568626.

It is an arithmetic number, because the mean of its divisors is an integer number (42208568626).

Almost surely, 2^84417137251 is an apocalyptic number.

84417137251 is a deficient number, since it is larger than the sum of its proper divisors (1).

84417137251 is an equidigital number, since it uses as much as digits as its factorization.

84417137251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The spelling of 84417137251 in words is "eighty-four billion, four hundred seventeen million, one hundred thirty-seven thousand, two hundred fifty-one".