1001892001 has 4 divisors (see below), whose sum is σ = 1092973104. Its totient is φ = 910810900.

The previous prime is 1001891987. The next prime is 1001892037. The reversal of 1001892001 is 1002981001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1002981001 = 11 ⋅91180091.

It is a cyclic number.

It is not a de Polignac number, because 1001892001 - 2¹¹ = 1001889953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001892041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45540535 + ... + 45540556.

It is an arithmetic number, because the mean of its divisors is an integer number (273243276).

Almost surely, 2^1001892001 is an apocalyptic number.

1001892001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001892001 is a deficient number, since it is larger than the sum of its proper divisors (91081103).

1001892001 is an equidigital number, since it uses as much as digits as its factorization.

1001892001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91081102.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1001892001 is about 31652.6776276510. The cubic root of 1001892001 is about 1000.6302696767.

The spelling of 1001892001 in words is "one billion, one million, eight hundred ninety-two thousand, one".