1000091001 has 16 divisors (see below), whose sum is σ = 1641175424. Its totient is φ = 527520384.

The previous prime is 1000090979. The next prime is 1000091003. The reversal of 1000091001 is 1001900001.

It is not a de Polignac number, because 1000091001 - 2⁷ = 1000090873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000091003) 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, 1831396 + ... + 1831941.

It is an arithmetic number, because the mean of its divisors is an integer number (102573464).

Almost surely, 2^1000091001 is an apocalyptic number.

It is an amenable number.

1000091001 is a deficient number, since it is larger than the sum of its proper divisors (641084423).

1000091001 is a wasteful number, since it uses less digits than its factorization.

1000091001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663360.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1000091001 is about 31624.2154210978. The cubic root of 1000091001 is about 1000.0303327466.

Adding to 1000091001 its reverse (1001900001), we get a palindrome (2001991002).

The spelling of 1000091001 in words is "one billion, ninety-one thousand, one".