1001131994 has 16 divisors (see below), whose sum is σ = 1572791040. Its totient is φ = 477029520.

The previous prime is 1001131991. The next prime is 1001132081. The reversal of 1001131994 is 4991311001.

It is not an unprimeable number, because it can be changed into a prime (1001131991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27689 + ... + 52620.

It is an arithmetic number, because the mean of its divisors is an integer number (98299440).

Almost surely, 2^1001131994 is an apocalyptic number.

1001131994 is a deficient number, since it is larger than the sum of its proper divisors (571659046).

1001131994 is a wasteful number, since it uses less digits than its factorization.

1001131994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80605.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1001131994 is about 31640.6699360175. The cubic root of 1001131994 is about 1000.3771890439.

Adding to 1001131994 its reverse (4991311001), we get a palindrome (5992442995).

The spelling of 1001131994 in words is "one billion, one million, one hundred thirty-one thousand, nine hundred ninety-four".