100561823 has 2 divisors, whose sum is σ = 100561824. Its totient is φ = 100561822.

The previous prime is 100561801. The next prime is 100561843. The reversal of 100561823 is 328165001.

It is a strong prime.

It is an emirp because it is prime and its reverse (328165001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100561823 - 2⁶ = 100561759 is a prime.

It is a super-2 number, since 2×100561823² = 20225360490166658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100561792 and 100561801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100561843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50280911 + 50280912.

It is an arithmetic number, because the mean of its divisors is an integer number (50280912).

Almost surely, 2^100561823 is an apocalyptic number.

100561823 is a deficient number, since it is larger than the sum of its proper divisors (1).

100561823 is an equidigital number, since it uses as much as digits as its factorization.

100561823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 100561823 is about 10028.0518048123. The cubic root of 100561823 is about 465.0265109948.

The spelling of 100561823 in words is "one hundred million, five hundred sixty-one thousand, eight hundred twenty-three".