100185427 has 4 divisors (see below), whose sum is σ = 102629016. Its totient is φ = 97741840.

The previous prime is 100185413. The next prime is 100185443. The reversal of 100185427 is 724581001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724581001 = 103 ⋅7034767.

It is a cyclic number.

It is not a de Polignac number, because 100185427 - 2¹⁵ = 100152659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100185395 and 100185404.

It is not an unprimeable number, because it can be changed into a prime (100185467) 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, 1221733 + ... + 1221814.

It is an arithmetic number, because the mean of its divisors is an integer number (25657254).

Almost surely, 2^100185427 is an apocalyptic number.

100185427 is a deficient number, since it is larger than the sum of its proper divisors (2443589).

100185427 is an equidigital number, since it uses as much as digits as its factorization.

100185427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443588.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 100185427 is about 10009.2670560836. The cubic root of 100185427 is about 464.4455981829.

The spelling of 100185427 in words is "one hundred million, one hundred eighty-five thousand, four hundred twenty-seven".