87767632439 has 2 divisors, whose sum is σ = 87767632440. Its totient is φ = 87767632438.

The previous prime is 87767632409. The next prime is 87767632493. The reversal of 87767632439 is 93423676778.

Together with next prime (87767632493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87767632439 - 2¹⁶ = 87767566903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87767632409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43883816219 + 43883816220.

It is an arithmetic number, because the mean of its divisors is an integer number (43883816220).

Almost surely, 2^87767632439 is an apocalyptic number.

87767632439 is a deficient number, since it is larger than the sum of its proper divisors (1).

87767632439 is an equidigital number, since it uses as much as digits as its factorization.

87767632439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 62.

The spelling of 87767632439 in words is "eighty-seven billion, seven hundred sixty-seven million, six hundred thirty-two thousand, four hundred thirty-nine".