84638700947 has 2 divisors, whose sum is σ = 84638700948. Its totient is φ = 84638700946.

The previous prime is 84638700943. The next prime is 84638700967. The reversal of 84638700947 is 74900783648.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84638700947 - 2² = 84638700943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84638700892 and 84638700901.

It is not a weakly prime, because it can be changed into another prime (84638700941) 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, 42319350473 + 42319350474.

It is an arithmetic number, because the mean of its divisors is an integer number (42319350474).

Almost surely, 2^84638700947 is an apocalyptic number.

84638700947 is a deficient number, since it is larger than the sum of its proper divisors (1).

84638700947 is an equidigital number, since it uses as much as digits as its factorization.

84638700947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 84638700947 in words is "eighty-four billion, six hundred thirty-eight million, seven hundred thousand, nine hundred forty-seven".