100791081 has 8 divisors (see below), whose sum is σ = 149320160. Its totient is φ = 67194036.

The previous prime is 100791073. The next prime is 100791091. The reversal of 100791081 is 180197001.

It is not a de Polignac number, because 100791081 - 2³ = 100791073 is a prime.

It is a super-2 number, since 2×100791081² = 20317684018297122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3733003 = 100791081 / (1 + 0 + 0 + 7 + 9 + 1 + 0 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100791091) 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, 1866475 + ... + 1866528.

It is an arithmetic number, because the mean of its divisors is an integer number (18665020).

Almost surely, 2^100791081 is an apocalyptic number.

It is an amenable number.

100791081 is a deficient number, since it is larger than the sum of its proper divisors (48529079).

100791081 is an equidigital number, since it uses as much as digits as its factorization.

100791081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3733012 (or 3733006 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 100791081 is about 10039.4761317511. The cubic root of 100791081 is about 465.3796275515.

The spelling of 100791081 in words is "one hundred million, seven hundred ninety-one thousand, eighty-one".