78689098487 has 2 divisors, whose sum is σ = 78689098488. Its totient is φ = 78689098486.

The previous prime is 78689098457. The next prime is 78689098513. The reversal of 78689098487 is 78489098687.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78689098487 - 2¹² = 78689094391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78689098457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39344549243 + 39344549244.

It is an arithmetic number, because the mean of its divisors is an integer number (39344549244).

Almost surely, 2^78689098487 is an apocalyptic number.

78689098487 is a deficient number, since it is larger than the sum of its proper divisors (1).

78689098487 is an equidigital number, since it uses as much as digits as its factorization.

78689098487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 390168576, while the sum is 74.

The spelling of 78689098487 in words is "seventy-eight billion, six hundred eighty-nine million, ninety-eight thousand, four hundred eighty-seven".