999263143691 has 8 divisors (see below), whose sum is σ = 1058102241840. Its totient is φ = 940430591488.

The previous prime is 999263143679. The next prime is 999263143717. The reversal of 999263143691 is 196341362999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999263143691 - 2¹⁴ = 999263127307 is a prime.

It is a super-2 number, since 2×999263143691² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999263143601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320446 + ... + 1934451.

It is an arithmetic number, because the mean of its divisors is an integer number (132262780230).

Almost surely, 2^999263143691 is an apocalyptic number.

999263143691 is a deficient number, since it is larger than the sum of its proper divisors (58839098149).

999263143691 is a wasteful number, since it uses less digits than its factorization.

999263143691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3272973.

The product of its digits is 17006112, while the sum is 62.

The spelling of 999263143691 in words is "nine hundred ninety-nine billion, two hundred sixty-three million, one hundred forty-three thousand, six hundred ninety-one".