100636243 has 4 divisors (see below), whose sum is σ = 106556040. Its totient is φ = 94716448.

The previous prime is 100636231. The next prime is 100636271. The reversal of 100636243 is 342636001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342636001 = 113 ⋅3032177.

It is a cyclic number.

It is not a de Polignac number, because 100636243 - 2²⁵ = 67081811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100636213) 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, 2959873 + ... + 2959906.

It is an arithmetic number, because the mean of its divisors is an integer number (26639010).

Almost surely, 2^100636243 is an apocalyptic number.

100636243 is a deficient number, since it is larger than the sum of its proper divisors (5919797).

100636243 is an equidigital number, since it uses as much as digits as its factorization.

100636243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919796.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 100636243 is about 10031.7617096899. The cubic root of 100636243 is about 465.1411958008.

It can be divided in two parts, 1006 and 36243, that added together give a square (37249 = 193²).

The spelling of 100636243 in words is "one hundred million, six hundred thirty-six thousand, two hundred forty-three".