84400187687 has 2 divisors, whose sum is σ = 84400187688. Its totient is φ = 84400187686.

The previous prime is 84400187659. The next prime is 84400187693. The reversal of 84400187687 is 78678100448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84400187687 - 2¹⁸ = 84399925543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84400187617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42200093843 + 42200093844.

It is an arithmetic number, because the mean of its divisors is an integer number (42200093844).

Almost surely, 2^84400187687 is an apocalyptic number.

84400187687 is a deficient number, since it is larger than the sum of its proper divisors (1).

84400187687 is an equidigital number, since it uses as much as digits as its factorization.

84400187687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 84400187687 in words is "eighty-four billion, four hundred million, one hundred eighty-seven thousand, six hundred eighty-seven".