999474239087 has 2 divisors, whose sum is σ = 999474239088. Its totient is φ = 999474239086.

The previous prime is 999474239053. The next prime is 999474239129. The reversal of 999474239087 is 780932474999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999474239087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999474239087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999474239887) 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, 499737119543 + 499737119544.

It is an arithmetic number, because the mean of its divisors is an integer number (499737119544).

Almost surely, 2^999474239087 is an apocalyptic number.

999474239087 is a deficient number, since it is larger than the sum of its proper divisors (1).

999474239087 is an equidigital number, since it uses as much as digits as its factorization.

999474239087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246903552, while the sum is 71.

The spelling of 999474239087 in words is "nine hundred ninety-nine billion, four hundred seventy-four million, two hundred thirty-nine thousand, eighty-seven".