84742145387 has 2 divisors, whose sum is σ = 84742145388. Its totient is φ = 84742145386.

The previous prime is 84742145363. The next prime is 84742145399. The reversal of 84742145387 is 78354124748.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84742145387 is a prime.

It is not a weakly prime, because it can be changed into another prime (84742141387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42371072693 + 42371072694.

It is an arithmetic number, because the mean of its divisors is an integer number (42371072694).

Almost surely, 2^84742145387 is an apocalyptic number.

84742145387 is a deficient number, since it is larger than the sum of its proper divisors (1).

84742145387 is an equidigital number, since it uses as much as digits as its factorization.

84742145387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6021120, while the sum is 53.

The spelling of 84742145387 in words is "eighty-four billion, seven hundred forty-two million, one hundred forty-five thousand, three hundred eighty-seven".