100123447 has 2 divisors, whose sum is σ = 100123448. Its totient is φ = 100123446.

The previous prime is 100123433. The next prime is 100123501. The reversal of 100123447 is 744321001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100123447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100123417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50061723 + 50061724.

It is an arithmetic number, because the mean of its divisors is an integer number (50061724).

Almost surely, 2^100123447 is an apocalyptic number.

100123447 is a deficient number, since it is larger than the sum of its proper divisors (1).

100123447 is an equidigital number, since it uses as much as digits as its factorization.

100123447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 100123447 is about 10006.1704462796. The cubic root of 100123447 is about 464.3498015608.

Adding to 100123447 its reverse (744321001), we get a palindrome (844444448).

The spelling of 100123447 in words is "one hundred million, one hundred twenty-three thousand, four hundred forty-seven".