100805387 has 4 divisors (see below), whose sum is σ = 100842000. Its totient is φ = 100768776.

The previous prime is 100805381. The next prime is 100805399. The reversal of 100805387 is 783508001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100805387 - 2⁴ = 100805371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100805381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13808 + ... + 19805.

It is an arithmetic number, because the mean of its divisors is an integer number (25210500).

Almost surely, 2^100805387 is an apocalyptic number.

100805387 is a deficient number, since it is larger than the sum of its proper divisors (36613).

100805387 is an equidigital number, since it uses as much as digits as its factorization.

100805387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36612.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 100805387 is about 10040.1885938462. The cubic root of 100805387 is about 465.4016447310.

The spelling of 100805387 in words is "one hundred million, eight hundred five thousand, three hundred eighty-seven".