100426538987 has 4 divisors (see below), whose sum is σ = 103889523120. Its totient is φ = 96963554856.

The previous prime is 100426538977. The next prime is 100426538999. The reversal of 100426538987 is 789835624001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789835624001 = 67 ⋅11788591403.

It is a cyclic number.

It is not a de Polignac number, because 100426538987 - 2⁸ = 100426538731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100426538977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731492023 + ... + 1731492080.

It is an arithmetic number, because the mean of its divisors is an integer number (25972380780).

It is a 1-persistent number, because it is pandigital, but 2⋅100426538987 = 200853077974 is not.

Almost surely, 2^100426538987 is an apocalyptic number.

100426538987 is a deficient number, since it is larger than the sum of its proper divisors (3462984133).

100426538987 is an equidigital number, since it uses as much as digits as its factorization.

100426538987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462984132.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 100426538987 in words is "one hundred billion, four hundred twenty-six million, five hundred thirty-eight thousand, nine hundred eighty-seven".