994454547839 has 2 divisors, whose sum is σ = 994454547840. Its totient is φ = 994454547838.

The previous prime is 994454547833. The next prime is 994454547851. The reversal of 994454547839 is 938745454499.

It is a weak prime.

It is an emirp because it is prime and its reverse (938745454499) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 994454547839 - 2²⁸ = 994186112383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994454547833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497227273919 + 497227273920.

It is an arithmetic number, because the mean of its divisors is an integer number (497227273920).

Almost surely, 2^994454547839 is an apocalyptic number.

994454547839 is a deficient number, since it is larger than the sum of its proper divisors (1).

994454547839 is an equidigital number, since it uses as much as digits as its factorization.

994454547839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 783820800, while the sum is 71.

The spelling of 994454547839 in words is "nine hundred ninety-four billion, four hundred fifty-four million, five hundred forty-seven thousand, eight hundred thirty-nine".