999423737794 has 4 divisors (see below), whose sum is σ = 1499135606694. Its totient is φ = 499711868896.

The previous prime is 999423737749. The next prime is 999423737797. The reversal of 999423737794 is 497737324999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 792967097169 + 206456640625 = 890487^2 + 454375^2 .

It is a super-2 number, since 2×999423737794² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999423737797) 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, 249855934447 + ... + 249855934450.

Almost surely, 2^999423737794 is an apocalyptic number.

999423737794 is a deficient number, since it is larger than the sum of its proper divisors (499711868900).

999423737794 is a wasteful number, since it uses less digits than its factorization.

999423737794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499711868899.

The product of its digits is 648121824, while the sum is 73.

The spelling of 999423737794 in words is "nine hundred ninety-nine billion, four hundred twenty-three million, seven hundred thirty-seven thousand, seven hundred ninety-four".