996134243257 has 4 divisors (see below), whose sum is σ = 996136738420. Its totient is φ = 996131748096.

The previous prime is 996134243249. The next prime is 996134243389. The reversal of 996134243257 is 752342431699.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 752342431699 = 53633 ⋅14027603.

It can be written as a sum of positive squares in 2 ways, for example, as 181138764816 + 814995478441 = 425604^2 + 902771^2 .

It is a 3-Lehmer number, since φ(996134243257) divides (996134243257-1)³.

It is a cyclic number.

It is not a de Polignac number, because 996134243257 - 2³ = 996134243249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 996134243198 and 996134243207.

It is not an unprimeable number, because it can be changed into a prime (996134243207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499032 + ... + 1497097.

It is an arithmetic number, because the mean of its divisors is an integer number (249034184605).

Almost surely, 2^996134243257 is an apocalyptic number.

996134243257 is the 499033-rd decagonal number.

It is an amenable number.

996134243257 is a deficient number, since it is larger than the sum of its proper divisors (2495163).

996134243257 is a wasteful number, since it uses less digits than its factorization.

996134243257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495162.

The product of its digits is 9797760, while the sum is 55.

The spelling of 996134243257 in words is "nine hundred ninety-six billion, one hundred thirty-four million, two hundred forty-three thousand, two hundred fifty-seven".