100438591423 has 2 divisors, whose sum is σ = 100438591424. Its totient is φ = 100438591422.

The previous prime is 100438591349. The next prime is 100438591427. The reversal of 100438591423 is 324195834001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100438591423 - 2¹⁷ = 100438460351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100438591427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50219295711 + 50219295712.

It is an arithmetic number, because the mean of its divisors is an integer number (50219295712).

Almost surely, 2^100438591423 is an apocalyptic number.

100438591423 is a deficient number, since it is larger than the sum of its proper divisors (1).

100438591423 is an equidigital number, since it uses as much as digits as its factorization.

100438591423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 100438591423 in words is "one hundred billion, four hundred thirty-eight million, five hundred ninety-one thousand, four hundred twenty-three".