78424792387 has 2 divisors, whose sum is σ = 78424792388. Its totient is φ = 78424792386.

The previous prime is 78424792379. The next prime is 78424792399. The reversal of 78424792387 is 78329742487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78424792387 - 2³ = 78424792379 is a prime.

It is not a weakly prime, because it can be changed into another prime (78424792367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39212396193 + 39212396194.

It is an arithmetic number, because the mean of its divisors is an integer number (39212396194).

Almost surely, 2^78424792387 is an apocalyptic number.

78424792387 is a deficient number, since it is larger than the sum of its proper divisors (1).

78424792387 is an equidigital number, since it uses as much as digits as its factorization.

78424792387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37933056, while the sum is 61.

The spelling of 78424792387 in words is "seventy-eight billion, four hundred twenty-four million, seven hundred ninety-two thousand, three hundred eighty-seven".