101000999 has 12 divisors (see below), whose sum is σ = 113730960. Its totient is φ = 89575200.

The previous prime is 101000993. The next prime is 101001001. The reversal of 101000999 is 999000101.

It is not a de Polignac number, because 101000999 - 2⁴ = 101000983 is a prime.

It is a Duffinian number.

101000999 is a modest number, since divided by 999 gives 101 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101000993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5219 + ... + 15140.

It is an arithmetic number, because the mean of its divisors is an integer number (9477580).

Almost surely, 2^101000999 is an apocalyptic number.

101000999 is a deficient number, since it is larger than the sum of its proper divisors (12729961).

101000999 is a wasteful number, since it uses less digits than its factorization.

101000999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20422 (or 20411 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 101000999 is about 10049.9253231056. The cubic root of 101000999 is about 465.7024862052.

The spelling of 101000999 in words is "one hundred one million, nine hundred ninety-nine", and thus it is an aban number.