1001991992239 has 16 divisors (see below), whose sum is σ = 1173793400640. Its totient is φ = 837381565440.

The previous prime is 1001991992237. The next prime is 1001991992251. The reversal of 1001991992239 is 9322991991001.

It is not a de Polignac number, because 1001991992239 - 2¹ = 1001991992237 is a prime.

It is a super-2 number, since 2×1001991992239² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1001991992239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001991992237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623134 + ... + 1546699.

It is an arithmetic number, because the mean of its divisors is an integer number (73362087540).

Almost surely, 2^{1001991992239} is an apocalyptic number.

1001991992239 is a deficient number, since it is larger than the sum of its proper divisors (171801408401).

1001991992239 is a wasteful number, since it uses less digits than its factorization.

1001991992239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171490.

The product of its (nonzero) digits is 708588, while the sum is 55.

The spelling of 1001991992239 in words is "one trillion, one billion, nine hundred ninety-one million, nine hundred ninety-two thousand, two hundred thirty-nine".