100001623 has 2 divisors, whose sum is σ = 100001624. Its totient is φ = 100001622.

The previous prime is 100001611. The next prime is 100001651. The reversal of 100001623 is 326100001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100001623 - 2⁵ = 100001591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100001653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50000811 + 50000812.

It is an arithmetic number, because the mean of its divisors is an integer number (50000812).

Almost surely, 2^100001623 is an apocalyptic number.

100001623 is a deficient number, since it is larger than the sum of its proper divisors (1).

100001623 is an equidigital number, since it uses as much as digits as its factorization.

100001623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 100001623 is about 10000.0811496707. The cubic root of 100001623 is about 464.1613944473.

Adding to 100001623 its reverse (326100001), we get a palindrome (426101624).

The spelling of 100001623 in words is "one hundred million, one thousand, six hundred twenty-three".