104280489491 has 2 divisors, whose sum is σ = 104280489492. Its totient is φ = 104280489490.

The previous prime is 104280489449. The next prime is 104280489541. The reversal of 104280489491 is 194984082401.

It is an a-pointer prime, because the next prime (104280489541) can be obtained adding 104280489491 to its sum of digits (50).

It is a weak prime.

It is an emirp because it is prime and its reverse (194984082401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 104280489491 - 2²² = 104276295187 is a prime.

It is a super-2 number, since 2×104280489491² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (104280489421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52140244745 + 52140244746.

It is an arithmetic number, because the mean of its divisors is an integer number (52140244746).

Almost surely, 2^104280489491 is an apocalyptic number.

104280489491 is a deficient number, since it is larger than the sum of its proper divisors (1).

104280489491 is an equidigital number, since it uses as much as digits as its factorization.

104280489491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 104280489491 in words is "one hundred four billion, two hundred eighty million, four hundred eighty-nine thousand, four hundred ninety-one".