100990429489 has 2 divisors, whose sum is σ = 100990429490. Its totient is φ = 100990429488.

The previous prime is 100990429469. The next prime is 100990429511. The reversal of 100990429489 is 984924099001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100938373264 + 52056225 = 317708^2 + 7215^2 .

It is a cyclic number.

It is not a de Polignac number, because 100990429489 - 2⁵ = 100990429457 is a prime.

It is a super-2 number, since 2×100990429489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100990429439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50495214744 + 50495214745.

It is an arithmetic number, because the mean of its divisors is an integer number (50495214745).

Almost surely, 2^100990429489 is an apocalyptic number.

It is an amenable number.

100990429489 is a deficient number, since it is larger than the sum of its proper divisors (1).

100990429489 is an equidigital number, since it uses as much as digits as its factorization.

100990429489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 100990429489 in words is "one hundred billion, nine hundred ninety million, four hundred twenty-nine thousand, four hundred eighty-nine".