999477452238437 has 2 divisors, whose sum is σ = 999477452238438. Its totient is φ = 999477452238436.

The previous prime is 999477452238247. The next prime is 999477452238493. The reversal of 999477452238437 is 734832254774999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 780596996775556 + 218880455462881 = 27939166^2 + 14794609^2 .

It is a cyclic number.

It is not a de Polignac number, because 999477452238437 - 2³⁰ = 999476378496613 is a prime.

It is a super-2 number, since 2×999477452238437² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999477452268437) 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, 499738726119218 + 499738726119219.

It is an arithmetic number, because the mean of its divisors is an integer number (499738726119219).

Almost surely, 2^{999477452238437} is an apocalyptic number.

It is an amenable number.

999477452238437 is a deficient number, since it is larger than the sum of its proper divisors (1).

999477452238437 is an equidigital number, since it uses as much as digits as its factorization.

999477452238437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23044331520, while the sum is 83.

The spelling of 999477452238437 in words is "nine hundred ninety-nine trillion, four hundred seventy-seven billion, four hundred fifty-two million, two hundred thirty-eight thousand, four hundred thirty-seven".