100640447 has 2 divisors, whose sum is σ = 100640448. Its totient is φ = 100640446.

The previous prime is 100640417. The next prime is 100640483. The reversal of 100640447 is 744046001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100640447 - 2¹⁸ = 100378303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100640417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50320223 + 50320224.

It is an arithmetic number, because the mean of its divisors is an integer number (50320224).

Almost surely, 2^100640447 is an apocalyptic number.

100640447 is a deficient number, since it is larger than the sum of its proper divisors (1).

100640447 is an equidigital number, since it uses as much as digits as its factorization.

100640447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 100640447 is about 10031.9712419843. The cubic root of 100640447 is about 465.1476726800.

Adding to 100640447 its reverse (744046001), we get a palindrome (844686448).

The spelling of 100640447 in words is "one hundred million, six hundred forty thousand, four hundred forty-seven".