100002187409 has 2 divisors, whose sum is σ = 100002187410. Its totient is φ = 100002187408.

The previous prime is 100002187357. The next prime is 100002187469. The reversal of 100002187409 is 904781200001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78430803025 + 21571384384 = 280055^2 + 146872^2 .

It is a cyclic number.

It is not a de Polignac number, because 100002187409 - 2¹² = 100002183313 is a prime.

It is not a weakly prime, because it can be changed into another prime (100002187469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50001093704 + 50001093705.

It is an arithmetic number, because the mean of its divisors is an integer number (50001093705).

Almost surely, 2^100002187409 is an apocalyptic number.

It is an amenable number.

100002187409 is a deficient number, since it is larger than the sum of its proper divisors (1).

100002187409 is an equidigital number, since it uses as much as digits as its factorization.

100002187409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The spelling of 100002187409 in words is "one hundred billion, two million, one hundred eighty-seven thousand, four hundred nine".